Find the y intercept of the equation 5x-2y=28

Answers

Answer 1

Answer:

y- intercept = - 14

Step-by-step explanation:

the y- intercept is the point on the y- axis where the line crosses.

at any point on the y- axis, the x- coordinate is zero.

let x = 0 in the equation and solve for y , the y- intercept

5(0) - 2y = 28

0 - 2y = 28

- 2y = 28 ( divide both sides by - 2 )

y = - 14 ← y- intercept

Answer 2
To find the y-intercept of the equation 5x - 2y = 28, we need to set x to zero and solve for y. When x = 0, the equation becomes:

5(0) - 2y = 28

Simplifying the equation, we get:

-2y = 28

Dividing both sides by -2, we get:

y = -14

Therefore, the y-intercept of the equation 5x - 2y = 28 is -14.

Related Questions

distinguish the number of solutions . show your work. explain how you know the number of solutions. -6x-4y=-4, 3x +2y=6

Answers

The number of solutions to the system of equations is n = 0

Given data ,

Let the first equation be represented as A

-6x - 4y = -4   be equation (1)

Let the second equation be represented as B

3x + 2y = 6   be equation (2)

Now , on simplifying , we get

-6x - 4y = -4

Multiply by -1 on both sides , we get

6x + 4y = 4

Divide by 2 on both sides , we get

3x + 2y = 2   be equation (3)

Now , the equation (2) and ( 3) are similar but the constant term is different

The slope of the first equation is -3/2 and the slope of the second equation is also -3/2. Since the slopes are the same, the two lines are parallel to each other.

When two lines are parallel, they never intersect, which means there are no common solutions for the system of equations

Hence , the equations are solved

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Write an equation to represent the function: reflected over the x-axis, then translated 6 units left

Answers

The equation of the transformed function is y = -f(x + 6)

Given data ,

Let the function be represented as f ( x )

Now , the value of f ( x ) is

f ( x ) = x

On simplifying , we get

Reflecting over the x-axis: To reflect a function over the x-axis, we multiply the function by -1. This changes the sign of the y-coordinate of each point on the graph of the function. So, the function after reflection over the x-axis would be y = -f(x).

Translating 6 units left: To translate a function 6 units to the left, we replace x with (x + 6). This shifts the graph of the function horizontally to the left by 6 units. So, the function after translation 6 units left would be y = -f(x + 6)

Hence , the function is y = -f(x + 6)

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it’s geometry and i HATE geometry

Answers

Answer:     <ABC =  <GHI     transitive property

Step-by-step explanation:

<ABC =  <GHI     transitive property

this is because if you have <B=<E and <H=<E   then <B=<H

thisis a tranisitive property

jackson well middle school find area.

Answers

multiply each shapes by length x width

Step-by-step explanation:

an example:

5x3 is 15

then do that for all of the shapes in this photo then add all of your answer together to get you're area

hope this helps

5. Let U = (x/x is less than 20, x €
N] and let A = (x/3 < x < 15), B =
(x/1 < x < 15) and C (x/x is an odd
number, x € Llj Carry out the
following operations and make
the Venn diagram
(a) AnB'
(B C'UA
(the bac
[d) (A'nc')

Answers

Okay, let's break this down step-by-step:

U = {x | x < 20, x is a natural number}

A = {x | 3 < x < 15}

B = {x | 1 < x < 15}

C = {x | x is an odd number, x is a natural number}

(a) A n B' (using De Morgan's law: A n B' = A' U B')

= {x | x ≥ 15 or x ≥ 3}

= {16, 17, 18, 19}

(b) B C' U A

= B U (C' U A)

= {1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14} U {1, 2, 3, 4, 5, 6, 7, 8, 9, 12, 14}

= {1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14}

(c) (A' n C ')

= (A' C') (by De Morgan's law)

= {x | x > 15 and x is even, x is a natural number}

= {16, 18}

The Venn diagram would be:

U A B C

_____|_____|_____|_____

| | | |

| | | |

| | ___|_____|___

| | | |

| | | 16, 17, 18, 19

| | | |

| | |_____|_____|___

| | | | |

| | | ___|_____|___

| | | | 16, 18

| | | |_____|_____|___

Does this make sense? Let me know if you have any other questions!

Need this asap help me

Answers

Answer:

  -1

Step-by-step explanation:

You want the average rate of change of the function shown in the graph between x=-1 and x=2.

Y-values

The y-value at x = -1 is 9.

The y-value at x = 2 is 6.

Rate of change

The graph changes by 6-9 = -3 units as x changes by 2 -(-1) = +3 units.

The average rate of change is ...

  (change in y) / (change in x) = -3/3 = -1

The average rate of change from x = -1 to x = 3 is -1.

<95141404393>

PLEASE HELP ME PLEASE LOOK AT THE PICTURE BELOW

Answers

Answer:

  162 square units

Step-by-step explanation:

You want the surface area of the trapezoidal prism.

Base area

The triangle at the top of each base is a right triangle with leg 3 units and hypotenuse 5 units. This tells you it is a 3-4-5 right triangle and the width of the prism is 4 units.

The area of each trapezoidal base is ...

  A = 1/2(b1 +b2)h = 1/2(3 +6)(4) = 18 . . . . . square units

Lateral area

The lateral area is the product of the height of the prism (7) and the perimeter of the base. The vertical edges of the base are 3 and 6, the horizontal edge is 4 (see above), and the slant edge is shown as 5. This means the perimeter is 3+6+4+5 = 18 units.

The lateral area of the prism is ...

  LA = Ph = (18)(7) = 126 . . . . . square units

Total surface area

The total surface area of the prism is the sum of the areas of the two bases and the lateral area:

  2(18) +126 = 162 . . . . . . square units

The surface area of the composite solid is 162 square units.

__

Additional comment

If you have forgotten about the 3-4-5 right triangle, you can find the missing side length using the Pythagorean theorem.

  a² +b² = c²

  3² +b² = 5²

  b² = 25 -9 = 16

  b = √16 = 4 . . . . . . the missing triangle side is 4 units long

<95141404393>

The Karns Recreation Hall needs to build a ramp. The height of the ramp must be 2 feet. The ramp will start 6 feet from the door. To the nearest tenth of a foot, how long will the ramp be?

Answers

Using the Pythagorean's theorem we can see that the length of the ramp is 6.32ft

How long the ramp will be?

We know that the ramp is a right triangle whose legs are 2 ft and 6 ft. Remember that by Pythagorean's theorem we know that the square of the hypotenuse is equal to the sum of the squares of the legs.

Then the length of the ramp L will be:

L² = (2ft)² + (6ft)²

L = √((2ft)² + (6ft)²)

L = 6.32ft

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In the most recent reporting period, the amount of cash paid by Nike for property, plant and equipment was (in millions)?

a.
$171.

b.
$695.

c.
$3,800.

d.
$4,904.

Answers

In the most recent reporting period, the amount of cash paid by Nike for property, plant and equipment was $4,904 million. The Option D is correct.

What are recognized as cash payment under property, plant and equipment section?

The cash payments under property, plant, and equipment (PP&E) are recognized in a company's financial statements when they represent actual expenditures for acquiring, constructing, or improving long-term assets.

Some examples of cash payments that could be recognized under PP&E include the purchase price of land or buildings, expenses related to preparing land for its intended use, costs incurred to construct new buildings or renovate existing ones, expenditures to install or upgrade equipment etc.

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You have a credit card with a current balance of $1500. The interest rate is 15.99%. If your minimum payment is 15% of your new balance, what is the balance of your card month 24? If your minimum payment is $75, what is the balance of your card month 24?

Answers

a) If the minimum payment is 15% on a credit card with a current balance of $1,500 and an interest rate of 15.99%, the balance of the card at month's end is $1,291.99.

b)  If the minimum payment is $75 on a credit card with a current balance of $1,500 and an interest rate of 15.99%, the balance of the card at month's end is $1,293.99.

What is the credit card balance?

The credit card balance refers to the difference between the beginning balance, payments, and interests.

a) Current balance on a credit card = $1,500

Interest rate = 15.99%

Minimum payment = 15%

= $225 ($1,500 x 15%)

Interest = $16.99 ($1,500 - $225 x 15.99% x 1/12)

Ending Balance = $1,291.99 ($1,500 +$16.99 - $225)

b) Current balance on a credit card = $1,500

Interest rate = 15.99%

Minimum payment = $75

Interest = $18.99 ($1,500 - $75 x 15.99% x 1/12)

Ending Balance = $1,293.99 ($1,500 +$18.99 - $225)

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Michael has an average daily balance on his credit card of $327.50. His credit card charges 11.99% annual interest. What will his monthly finance charge be?

Answers

Answer:

First, we need to calculate Michael's daily interest rate:

0.1199 / 365 = 0.0003282

Then, we can calculate his daily finance charge:

327.50 x 0.0003282 = 0.1075

To find his monthly finance charge, we multiply his daily finance charge by the number of days in a month:

0.1075 x 30 = 3.225

So Michael's monthly finance charge will be $3.23 (rounded to the nearest cent).

Please help.


Draw a sketch to show two

figures that have the same number of unit cubes

that look different from each other.

Answers

The two figures that have the same number of cubes are given.

We have,

The number of cubes in each figure drawn = 5 cubes

We can also find the area of each figure,

Consider each cube has a side of 2 cm

Figure 1:

Two rectangles.

So,

Area = 6 x 2 + 4 x 2 = 12 + 8 = 20 square units

Figure 2:

Area = 10 x 2 = 20 square units.

Thus,

The two figures that have the same number of cubes are given.

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A company has 7000 arrivals of Internet traffic over a period of 16,780 thousandths of a minute. Let the random variable
× represent the number of such Internet traffic arrivals in one thousandth of a minute. It appears that these Internet
-M
arrivals have a Poison distribution. If we want to use the formula ply= l"•é
to find the probability of exactly 3
X!
arrivals in one thousandth of a minute, what are the values of y, ×, and e that would be used in that formula?

Answers

The values we used in the Poisson probability formula are:

μ = λ = 0.4168

x = 3

e ≈ 2.718

What is Poisson probability?

The Poisson probability distribution is a statistical distribution that models the probability of a certain number of events occurring in a fixed interval of time or space, given the average rate of occurrence of the events.

The Poisson distribution has a mean and variance of λ. Therefore, in this case, the mean and variance of the number of Internet traffic arrivals in one thousandth of a minute are equal to λ.

We can find the value of μ by dividing the total number of arrivals (7000) by the total time period (16,780):

μ[tex]= 7000/16,780 = 0.4168[/tex]

We can use μ as the value of λ in the Poisson distribution since they are equal.

To find the probability of exactly 3 arrivals in one thousandth of a minute, we use the Poisson probability formula:

P(x=3) = (e^(-λ) * λ^x) / x!

where x = 3.

Substituting the values we have:

[tex]P(x=3)[/tex][tex]= (e^(-0.4168) * 0.4168^3) / 3![/tex]

Using a calculator, we can evaluate e^(-0.4168) to be 0.6596, and simplify the denominator:

[tex]P(x=3) = (0.6596 * 0.0287) / 6[/tex]

[tex]P(x=3) ≈ 0.000305[/tex]

Therefore, the values we used in the Poisson probability formula are:

μ = λ = 0.4168

x = 3

e ≈ 2.718

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The values we used in the Poisson probability formula are:

μ = λ = 0.4168

x = 3

e ≈ 2.718

What is Poisson probability?

The Poisson probability distribution is a statistical distribution that models the probability of a certain number of events occurring in a fixed interval of time or space, given the average rate of occurrence of the events.

The Poisson distribution has a mean and variance of λ. Therefore, in this case, the mean and variance of the number of Internet traffic arrivals in one thousandth of a minute are equal to λ.

We can find the value of μ by dividing the total number of arrivals (7000) by the total time period (16,780):

μ[tex]= 7000/16,780 = 0.4168[/tex]

We can use μ as the value of λ in the Poisson distribution since they are equal.

To find the probability of exactly 3 arrivals in one thousandth of a minute, we use the Poisson probability formula:

P(x=3) = (e^(-λ) * λ^x) / x!

where x = 3.

Substituting the values we have:

[tex]P(x=3)[/tex][tex]= (e^(-0.4168) * 0.4168^3) / 3![/tex]

Using a calculator, we can evaluate e^(-0.4168) to be 0.6596, and simplify the denominator:

[tex]P(x=3) = (0.6596 * 0.0287) / 6[/tex]

[tex]P(x=3) ≈ 0.000305[/tex]

Therefore, the values we used in the Poisson probability formula are:

μ = λ = 0.4168

x = 3

e ≈ 2.718

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7.54 Torque on a rusty bolt.

(a) Do you think it is reasonable to apply ANOVA in this case?

(b) Regardless of your answer in part (a), describe hypotheses for ANOVA in this context, and use the table below to carry out the test. Give your conclusion in the context of the data.

(c) The table below are p-values for pairwise t-tests comparing each of the different groups. These p-values have not been corrected for multiple comparisons. Which pair of groups appears most likely to represent a difference?

(d) There are 28 p-values shown in the table in part (c). Determine if any of them are statistically significant after correcting for multiple comparisons. If so, which one(s)? Explain your answer.

Answers

Answer:

Answer is obstacle by giving up yours

Calculating Perpetuity Values

Curly’s Life Insurance Co. is trying to sell you an investment policy that will pay you and your heirs $25,000 per year forever. A representative for the company tells you the policy costs $500,000. At what discount rate would this be a fair deal?

Provide the formula through excel

Answers

Answer:

a discount rate of 5%

Step-by-step explanation:

The formula to calculate the present value of a perpetuity is:

PV = PMT / r

Where PV is the present value, PMT is the constant payment, and r is the discount rate.

In this case, the PMT is $25,000 and the PV is -$500,000 (negative because it represents a cash outflow). So we can rearrange the formula to solve for r:

r = PMT / PV

r = $25,000 / -$500,000

r = -0.05 or -5%

Therefore, at a discount rate of 5%, the policy would be a fair deal.

To calculate this in Excel, you can use the following formula in a cell:

=r(-25000/500000)

This will give you a result of -0.05, or -5%, which represents the fair discount rate.

Hope this helps!

999.989959+9999999999.584775748845747887=

Answers

10000000999.6 is the answer

Victoria bought a box of raisins and gave of the raisins to her younger brother.
About what percent of the raisins did she keep for herself?
F 30%
G 33%
H 66%
J 70%

Answers

The percent of the raisins that Victoria she keep for herself is 70%

How to calculate the percentage

Based on the information, a percentage simply has to do with the a value or ratio which can be stated as a fraction of 100.

Since Victoria bought a box of raisins and gave 3/10 of the raisins to her younger brother. The percent of the raisins she keep for herself will be:

= (1 - 3/10) × 100

= 70%

Therefore, the percent of the raisins that Victoria she keep for herself is J 70%

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Victoria bought a box of raisins and gave 3/10 of the raisins to her younger brother.

About what percent of the raisins did she keep for herself?

F 30%

G 33%

H 66%

J 70%

URGENT!! ILL GIVE
BRAINLIEST! AND 100 POINTS

Answers

1) Percent of time that customers at the old store bought milk shakes is: 20%

2) Percent of time that customers at the new store bought milk shakes is:

26%

3) Percent of total sales that were ice cream is: 78%

4) Percent of new store sales of both shops is: 35%

How to find the percentage?

We are given the following parameters:

Number of Servings of Icecream in Old store = 52100

Number of milk shakes in old store = 13400

Number of Servings of Icecream in New store = 25800

Number of milk shakes in new store = 9200

1) Percent of time that customers at the old store bought milk shakes is:

Percentage = [13400/(52100 + 13400)] * 100%

≈ 20%

2) Percent of time that customers at the new store bought milk shakes is:

Percentage = [9200/(25800 + 9200)] * 100%

≈ 26%

3) Percent of total sales that were ice cream:

Percentage = [(52100 + 25800)/(52100 + 25800 + 13400 + 9200)] * 100%

≈ 78%

4) Percent of new store sales of both shops is:

Percentage = (25800 + 9200)/(52100 + 25800 + 13400 + 9200)] * 100%

≈ 35%

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what’s the value of x and y?

Answers

Answer:

the answer os 53

Step-by-step explanation:

5. (10 points) The fill volume of an automated filling machine used for filling cans of carbonated beverage is normally distributed with a mean of 367 ml and a standard deviation of 3 ml. If all cans less than 358 or greater than 373 ml are scrapped, what proportion of cans is scrapped? Solution:

Answers

The proportion of cans that are scrapped is approximately 0.0241.

We know that the fill volume of cans follows a normal distribution with a mean of 367 ml and a standard deviation of 3 ml. Let's define X as the fill volume of a single can. Then we can write:

X ~ N(367, 3)

We want to find the proportion of cans that are scrapped, i.e., the proportion of cans with a fill volume less than 358 ml or greater than 373 ml. Let's call this proportion p:

p = P(X < 358 or X > 373)

To solve this problem, we can use the standard normal distribution and the z-score formula:

z = (X - μ) / σ

where μ is the mean and σ is the standard deviation of the distribution. We can standardize the values 358 and 373 using this formula:

z1 = (358 - 367) / 3 = -3

z2 = (373 - 367) / 3 = 2

Now we can find the probabilities of the two events separately using the standard normal distribution table or a calculator:

P(X < 358) = P(z < -3) ≈ 0.0013

P(X > 373) = P(z > 2) ≈ 0.0228

The probability of either event happening is the sum of the probabilities:

P(X < 358 or X > 373) = P(X < 358) + P(X > 373) ≈ 0.0241

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Mariano has $3.55 in nickels and quarters. The total number of coins is 5 less than twice the number of nickels. Which system of equations can be used to determine q, the number of quarters, and n, the number of nickels, that Mariano has?

Answers

The system of equations that can be used to determine q and n is:

25q + 5n = 355

q = 2n - 5

We have,

Let's use q to represent the number of quarters and n to represent the number of nickels.

The value of q quarters is 25q cents, and the value of n nickels is 5n cents.

The total value of Mariano's coins is 3.55, or 355 cents.

We can write the first equation based on these values:

25q + 5n = 355

The second sentence tells us that the total number of coins is 5 less than twice the number of nickels.

Since each nickel is one coin, the number of quarters must be two less than the total number of coins.

We can write the second equation based on this information:

q = 2n - 5

Therefore,

The system of equations that can be used to determine q and n is:

25q + 5n = 355

q = 2n - 5

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Consider the probability that exactly 91
out of 153
registered voters will vote in the presidential election. Assume the probability that a given registered voter will vote in the presidential election is 59%
.

Answers

Step-by-step explanation:

We can use the binomial distribution to compute the probability that exactly 91 out of 153 registered voters will vote in the presidential election, assuming that the probability that any given registered voter will vote in the presidential election is 59%.

The probability mass function of the binomial distribution is:

P(X = k) = (n choose k) * p^k * (1 - p)^(n - k)

where:

- n is the number of trials (in this case, the number of registered voters)

- k is the number of successes (in this case, the number of registered voters who will vote in the election)

- p is the probability of success on any individual trial (in this case, the probability that a given registered voter will vote in the election)

Using this formula, we can calculate:

P(exactly 91 out of 153 voters will vote) = (153 choose 91) * 0.59^91 * (1 - 0.59)^(153 - 91)

= 0.037

Therefore, the probability that exactly 91 out of 153 registered voters will vote in the presidential election is approximately 0.037, or about 3.7%.

ou’re shopping for a jacket online and find one you like for €110.50 Euro, which is
equal to $125 U.S.
a. What is worth more, $1 U.S. or €1 Euro? Explain.
b. Fill in the blanks. Show how you arrive at your answers.
$1 U.S. ≈ €____________________ Euro €1 Euro ≈ $____________________ U.S.
c. You see the same jacket on another site for ₱ 2,000 Mexican Pesos. Use the fact that $1
U.S. is about ₱ 20.66 Mexican Pesos to determine whether this is cheaper than $125 U.S.
Show how you arrive at your answer.
7. The current average cost of gas in Italy is €1.726 Euro per liter. What is this cost in
U.S. Dollars per gallon? Use your answer to Problem #6b and the fact that there are
about 0.26 gallons in 1 liter.
75

Answers

a. At the current exchange rate, €1 Euro is worth more than $1 U.S. This is because 1 Euro is equivalent to $1.13 U.S. (as given in the problem), which means that for every one dollar, you would receive less than one Euro in exchange. Therefore, €1 Euro is worth more than $1 U.S.

b. To fill in the blanks, we need to use the given conversion rate of €1 Euro = $1.13 U.S. and reciprocate it to find $1 U.S. ≈ €0.885 Euro. Using this conversion rate, we can find that:

$1 U.S. ≈ €0.885 Euro
€1 Euro ≈ $1.13 U.S.

c. To determine whether the jacket is cheaper when priced in Mexican Pesos, we need to convert the price to U.S. dollars using the given exchange rate of $1 U.S. = ₱20.66 Mexican Pesos.

The price of the jacket in Mexican Pesos is ₱2,000. To convert this to U.S. dollars, we divide by the exchange rate:

₱2,000 ÷ 20.66 = $96.89 U.S.

Since $96.89 U.S. is less than $125 U.S. (the price of the jacket in the first website), the jacket priced in Mexican Pesos is cheaper.

7. To convert from Euro per liter to U.S. Dollars per gallon, we need to use the conversion factors from Problem 6b and the fact that there are approximately 3.785 liters in one gallon. First, we can convert from Euro per liter to U.S. dollars per liter by multiplying the cost in Euro per liter by the conversion rate:

€1.726 Euro/L × $1.13 U.S./€1 Euro ≈ $1.95 U.S./L

Then, we can convert from US dollars per liter to U.S. dollars per gallon:

$1.95 U.S./L ÷ 3.785 L/gallon ≈ $0.52 U.S./gallon

Therefore, the cost of gas in Italy is approximately $0.52 U.S. per gallon.
a. To determine which is worth more, we need to compare the exchange rates. If €1 Euro is worth more than $1 U.S., then the Euro is worth more. If $1 U.S. is worth more than €1 Euro, then the dollar is worth more. As of the given exchange rate, €1 Euro is worth less than $1 U.S., so $1 U.S. is worth more.

b. To fill in the blanks, we can use the given exchange rate of €110.50 Euro = $125 U.S.:

$1 U.S. ≈ €0.884 Euro

€1 Euro ≈ $1.129 U.S.

c. To determine if ₱ 2,000 Mexican Pesos is cheaper than $125 U.S., we need to convert the price in Mexican Pesos to U.S. dollars. We can use the exchange rate provided:

$1 U.S. ≈ ₱20.66 Mexican Pesos

So, ₱ 2,000 Mexican Pesos is:

₱ 2,000 / ₱20.66/$1 U.S. = $96.89 U.S.

Since $96.89 U.S. is less than $125 U.S., the jacket on the other site is cheaper.

d. To determine the cost of gas in U.S. dollars per gallon, we need to convert the cost in Euros per liter to U.S. dollars per gallon. We can use the exchange rate:

$1 U.S. ≈ €0.884 Euro

There are 0.26 gallons in 1 liter, so we can convert the cost per liter to cost per gallon:

€1.726 Euro / 1 liter * $1 U.S. / €0.884 Euro * 0.26 gallons / 1 liter = $8.12 U.S. per gallon

Therefore, the cost of gas in Italy is about $8.12 U.S. per gallon.

calculate the lengths a, b, c, d, e, f, g and h​

Answers

A.) The length of the missing part of the triangle would be given as follows;

a = 4

b = 3

How to calculate the length of the missing sides of the triangle?

To calculate the missing part of the triangle, the sine formula should be used such as follows;

x /SinX = b/sinB

where;

x= 5

X = 90

b = ?

B = 37°

That is;

5/sin90 = b/sin37

make b the subject of formula;

b = 5× 0.601815023/1

= 3

a² = C²- b²

= 25-9

= 16

a = √16 = 4

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in the space below draw a triangle with angles 60° and 60° and an included length of 1 inch

Answers

The triangle presented in the diagram drawn is known as equilateral triangle.

What is triangle with angle 60?

A triangle with angle 60 degrees is known as equilateral triangle because the sum of angles in a triangle is 180 degrees.

So if the total angles in a triangles is 180 degrees, and two known angles are 60 degrees, then the remaining side will be 60 degrees.

In an equilateral triangle, each of the interior angle measures 60 degrees.

Thus, the triangle presented in the diagram drawn is known as equilateral triangle.

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Plsss help this is hard giving 20 pnts!!!

Answers

Answer:I need part A to answer

Step-by-step explanation:

A rectangle has sides measuring (2x + 7) units and (5x + 9) units.

Part A: What is the expression that represents the area of the rectangle? Show your work. (4 points)

Part B: What are the degree and classification of the expression obtained in Part A? (3 points)

Part C: How does Part A demonstrate the closure property for polynomials? (3 points)

Answers

Answer:

A: (2x + 7)(5x + 9) = 10x^2 + 53x + 63

B: second-degree (quadratic) polynomial

C: The product of two polynomials is a polynomial.

Part A: we simply need to multiply this out using the distributive property:

Area = 2x5x + 2x9 + 75x + 79

= 10x² + 18x + 35x + 63

= 10x² + 53x + 63 (4 points)

Part B:A polynomial of degree 2 is called a quadratic polynomial. So, the classification of this polynomial is "quadratic". (3 points)

Part C:In the case of the set of polynomials, the closure property for multiplication says that multiplying any two polynomials results in another polynomial. This is demonstrated in Part A where we multiplied two polynomials - (2x + 7) and (5x + 9) - and the result was another polynomial - 10x² + 53x + 63. This shows that the set of polynomials is closed under multiplication. (3 points)

Part A:

The area of a rectangle is given by the product of its length and width. Therefore, for a rectangle with sides measuring (2x + 7) units and (5x + 9) units, the area can be represented as:

Area = (2x + 7)(5x + 9)

Now, we simply need to multiply this out using the distributive property:

Area = 2x5x + 2x9 + 75x + 79

= 10x² + 18x + 35x + 63

= 10x² + 53x + 63 (4 points)

Part B:

The degree of a polynomial is the highest power of x in the polynomial. Here, the highest power of x is 2 (in the term 10x²), so the degree of this polynomial is 2.

A polynomial of degree 2 is called a quadratic polynomial. So, the classification of this polynomial is "quadratic". (3 points)

Part C:

The closure property of an operation (like addition, multiplication, etc.) on a set says that applying the operation to any elements in the set always results in an element that is also in the set.

In the case of the set of polynomials, the closure property for multiplication says that multiplying any two polynomials results in another polynomial. This is demonstrated in Part A where we multiplied two polynomials - (2x + 7) and (5x + 9) - and the result was another polynomial - 10x² + 53x + 63. This shows that the set of polynomials is closed under multiplication. (3 points)

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school administrator believes that the mean class GPAs for a given course are higher than the preferred mean of 2.75 at a significance level of 0.05, and checks a randomly chosen sample of 50 classes. Create a histogram, and calculate x, the t-statistic, and the p-value.
3.09
2.73
2.58
2.68
2.84
2.68
2.64
2.62
2.35
2.72
2.63
2.77
2.72
3.03
2.71
2.96
2.74
3.01
2.88
2.68
2.83
3.02
2.83
2.71
2.67
2.79
2.65
2.56
2.78
2.89
2.40
2.38
2.41
2.83
2.86
3.01
2.80
2.84
2.95
2.75
2.93
2.48
2.34
2.97
2.85
2.74
2.84
3.10
2.62
2.77

Answers

It can be concluded that there exists ‘insufficient evidence’ depicting that the ‘new mean GPA is more than 2.75’.

Therefore, X= 2.7532; T = 0.1203; P = 0.4524.

How to solve

H0: ‘The mean class GPAs for a given course’ is equal to 2.75.

H1: ‘The mean class GPAs for a given course’ exceeds 2.75.

Our 'sample size' n = 50 and we calculate the ‘sample mean and sd’ with 'Excel', through its respective code ‘AVERAGE()’.

The resultant ‘sample mean’ xbar equals to 2.7532, while implementing the code ‘STDEV.S()’ gives us the ‘sample sd’ s being 0.188164.

The ‘hypothesized mean’ μ0 is again fixed at 2.75. Given that the ‘population sd is unknown’, we are obliged to perform a ‘t-test’ in order to receive our data.

Evaluating this test statistic provides us with-

T = (xbar-μ0)/(s/√n)

= (2.7532-2.75)/(0.188164/√50)

= 0.0032/0.0266

= 0.1203

Also, taking into account the 'degrees of freedom', which is (n-1), we figure out that it sums up to 49.

After conjuring a 'students t distribution', we get a P-value of 0.4524. Hereby, as the ‘P-value surpasses the significant level of 0.05’, the ‘null hypothesis fails to be dismissed’.

Consequently, it can be concluded that there exists ‘insufficient evidence’ depicting that the ‘new mean GPA is more than 2.75’.

Therefore, X= 2.7532; T = 0.1203; P = 0.4524.

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Express the answers in simplest form. A list contains the names of six anthropology students, two sociology students, and four psychology professor's new study, find the probability that the chosen student (a) A psychology student (c) A psychology student or an anthropology (d) Not a sociology student.​

Answers

a) P(psychology student)  = 1/3. b) P(psychology or anthropology student)  = 5/6. c) P(not sociology student)= 5/6

How to find the probability that the chosen student

(a) The probability of choosing a psychology student is the number of psychology students divided by the total number of students:

P(psychology student) = 4/(6+2+4) = 4/12 = 1/3

(b) The probability of choosing a psychology student or an anthropology student is the sum of the number of psychology and anthropology students divided by the total number of students:

P(psychology or anthropology student) = (4+6)/(6+2+4) = 10/12 = 5/6

(c) The probability of not choosing a sociology student is the number of non-sociology students divided by the total number of students:

P(not sociology student) = (6+4)/(6+2+4) = 10/12 = 5/6

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Lily took a survey of 80 students on 7th grade and 150 students in 8th grade she found that 80% of the 7th graders like country music while only 60% of the 8th graders like it. Which statement is true

Answers

If Lily took a survey of 80 students of 7th grade and 150 students of 8th grade, then there are 64 "7th" grade students, and 90 "8th" grade students who like music.

First we find the the number of students who like music in "7th-grade".

Number of 7th grader students that are being surveyed = 80,

Percent of 7th graders who like country music = 80%,

So, Number of 7th graders who like country music are

⇒ 80% of 80 = 0.8 × 80 = 64

So, 64 out of the 80 students in 7th grade like country music.

For 8th graders;

Number of "8th-grader" students that are being surveyed = 150,

Percent of 8th graders who like country-music = 60%,

So, Number of 8th graders who like country music

⇒ 60% of 150 = 0.6 × 150 = 90,

Therefore, 90 out of the 150 students in 8th grade like country music.

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The given question is incomplete, the complete question is

Lily took a survey of 80 students on 7th grade and 150 students in 8th grade she found that 80% of the 7th graders like country music while only 60% of the 8th graders like it. Find the number of students from each grade who like music.

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