The sum of two numbers is 2. The difference between 8 and twice the smaller number is two less than four times the large number. Find the numbers.

Answer:

x= 2.7,-11.7 (sorry if im wrong) :'C

A population has a standard deviation of 10 and a mean of 75.

The sample mean has a standard deviation of 5 and an expectation of 100.The empirical rule states that there is a 68% probability of being between 95 and 105 (within one standard deviation of its expected value) if it is approximately normal.

What is meant by a standard deviation?

A measure of how dispersed the data are in relation to the mean is called the standard deviation (or ).Data with a low standard deviation are grouped around the mean, while data with a high standard deviation are more dispersed.

How can I determine the standard deviation?

Step 1: Locate the mean. Step 2: Find the square of the distance from the mean for each data point. Step 3: Sum the results of Step 2's values. Step 4: Divide by how many data points there are.

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The interest amount is $120 when given principal amount $2000, rate of interest per year is 3% and time period is 2 years.

Given that,

p = $2,000, r = 3%, and t = 2 yr.

We have to find the i when i=prt.

Here,

i is interest amount.

p is principal amount.

r is rate of interest per year.

t is time period.

So,

Formula for finding interest amount is

i=prt

So,

i=2000(3/100)(2)

i=20×3×2

i=120

Therefore, The interest amount is $120 when given principal amount $2000, rate of interest per year is 3% and time period is 2 years.

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Answer:

Bottom left

Step-by-step explanation:

Let's look at it as (1/3)^x first. This function would have a y-intercept of (0,1) (because (1/3)^0 is 1), and would then become (1/3) times smaller for every 1 unit increment of x. This would look like the top left graph in these options. However, we are given (1/3)^-x, which means, in terms of transformations, that the graph is flipped across the y-axis. Algebraically, this looks like (1/3)^(-x) which equals to  [tex]\frac{1}{(1/3)^x}[/tex], which simplifies down to 3^x, which would look like the bottom left graph.

Standard deviation for the given set of data { 6,7,8,9,10} is equal to √2.

As given in the question,

Given set of data is equal to :

{ 6,7,8,9,10}

[tex]x_{i}[/tex] = { 6,7,8,9,10}

Here total number of observation 'N' is equal to 5.

Mean [tex]\bar{x}[/tex] = ∑x / n

            = ( 6+ 7+ 8 + 9 + 10 ) / 5

            = 40 /5

            = 8

[tex]\sum (x_{i} -\bar{x})^{2}[/tex] = ( 6- 8)² + (7-8)² + (8 - 8)²+ ( 9 -8)² + (10 - 8)²

                 = 4 + 1+ 0 + 1+ 4

                 = 10

Standard deviation = [tex]\sqrt{ \frac{\sum (x_{i} -\bar{x})^{2}}{N}[/tex]

                                = √10/5

                                = √2

Therefore, standard deviation for the given set of data { 6,7,8,9,10} is equal to √2.

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Answer:

  B.) 4x^2 - 15x - 54

Step-by-step explanation:

You want the product f(x)·g(x) when f(x) = 4x+9 and g(x) = x-6.

The distributive property can be used to find the product. Each term of one binomial is multiplied by every term of the other, and like terms are combined.

  f(x)·g(x) = (4x +9)·(x -6)

  = 4x(x -6) +9(x -6)

  = 4x² -24x +9x -54 = 4x² +(-24 +9)x -54

  f(x)·g(x) = 4x² -15x -54 . . . . . . . . . . matches choice B

__

Additional comment

The product of two binomials is sometimes described using the mnemonic FOIL, for First, Outer, Inner, Last. These refer to the locations of the terms involved in the four products

These products are the same as the ones we show above.

The FOIL mnemonic is only helpful for two binomials. Any polynomials can be multiplied using the distributive property.

Answer:

27

Step-by-step explanation:

I broke the figure up into 3 rectangles.

5x2 = 10

2x3 = 6

4x5 = 20

This adds to 36.  Then subtract out the green square of 9

36 - 9 = 27

Answer:

$5

Step-by-step explanation:

Since $10 for 6 avocados and 3 = half of 6,

You would half $10 too = $5

Answer:

$5

Step-by-step explanation:

divide both numbers by 2 and there is your answer

Answer:

Step-by-step explanation:

The question is asking how many times does 50 go into 425?

or 450/50 = ?

my calculator says it's 9 .  What does your calculator say?

since we now know it's 9 times,   we can just multiply 9 * 10 minutes

by observation of 9*10,  I get the answer,  what answer do you get?

The probability that a dart hits one of the shaded areas is 1/6 when a dart is thrown at a regular hexagon dartboard with the design shown.

The area of mathematics known as probability studies potential outcomes of events as well as their relative probabilities and distributions.

Here,

angle of hexagon=360/6=60°

using trigonometric ratios,

area of triangle=bh/2

=(h*h√3/2)/2

=h²√3/4

area of hexagon=6*area of triangle

=6*(h²√3/4)

=3√3*h²/2

area of rectangle=bh

=h*h√3

=h²√3

area of shaded region,

=3√3*h²/2-h²√3

=h²√3/2

area of 1 shaded region=(h²√3/2)/2

=h²√3/4

Probability of hitting one shaded area,

=(h²√3/4)/(h²3√3/2)

=1/6

When a dart is thrown at a standard hexagonal dartboard with the pattern shown, the likelihood that it will land in one of the shaded areas is 1/6.

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Answer:Here's the basic equation

m(d) = 10d + 20(d - 2)  (the money total is the 10 dollar bills plus the 20 dollar bills (which are two less than the 10 dollars))

Step-by-step explanation:

To simplify it, start by distributing the 20:

m(d) = 10d + 20d - 40

add like terms

m(d) = 30d - 40

Answer:

slope = 10

Step-by-step explanation:

Solve the equation for "y". In other words, isolate "y":

y + 7 = 10(x - 4)

y = 10(x - 4) - 7

y = 10x - 40 - 7

y = 10x - 47

Above is a linear expression in slope-intercept form "y = mx + b", where "m=slope" and "b=y-intercept". "m=10", so 10 is the slope

Answer:

5+0.1x=3-0.9x

2=-0.10x

1=-0.5x

x=-2

Answer is B good luck comrade<33!!

The ratio of green apples to all apples in the basket is 5:14 and the ratio of red apples to all apples in the basket is 9:14.

According to the question,

We have the following information:

There are five green apples and nine red apples in a basket.

Now, total apples in the basket are (5+9) which is 14.

Now, the ratio of green apples to all apples in the basket:

Number of green apples : total apples in the basket

5:14

Now, the ratio of red apples to all apples in the basket:

Number of red apples : total apples in the basket

9:14

Hence, the ratio of green apples to all apples in the basket is 5:14 and the ratio of red apples to all apples in the basket is 9:14.

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Answer:

-4

Step-by-step explanation:

The line intercepts at the y axis on exactly -4.

Answer:

The y-intercept is (0,-4).

Step-by-step explanation:

You can see that for the y-axis, that is the first point the line passes through. Hope this helps! Good luck! I am up doing math too. -_- Don't mark me brainliest, I just like to help.

The Fourier series representation of the output y(t) is;

(a) y(t) = 0.097 cos(3πt - 67)

(b) y(t) = 0.097 sin(3πt - 67) + 0.051 cos(6πt + π/4 -78)

Given;

A causal continuous-time LTI system whose input x(t) and output y(t) are related by the following differential equation;

[tex]\frac{d}{dt}y(t) + 4y(t) = x(t)[/tex]

By taking Laplace's Transform;

sY(s) + 4Y(s) = X(s)

Y(s)/X(s) = H(s) = 1/(s + 4)

(a) When input x(t) = cos3πt

∵ ω = 3π

H(jω) = 1/(jω + 4)

H(jω₁) = 1/[tex]\sqrt{w^2+4^2}[/tex] = 0.097

∠H(jω) = -tan⁻¹(ω/4) = -67° = Ф₁

y(t) = H(jω₁)*cos(3πt + Ф₁)

→ y(t) = 0.097 cos(3πt - 67)

(b) When input x(t) = sin3πt + cos(6πt + π/4)

∵ ω = 6π

H(jω) = 1/(jω + 4)

H(jω₂) = 1/[tex]\sqrt{w^2+4^2}[/tex] = 0.051

∠H(jω) = -tan⁻¹(ω/4) = -78° = Ф₂

y(t) = H(jω₁) * sin(3πt + Ф₁) +  H(jω₂) * cos(6πt + π/4 + Ф₂)

→  y(t) = 0.097 sin(3πt - 67) + 0.051 cos(6πt + π/4 -78)

The Fourier series representation of the output y(t) is;

y(t) = 0.097 cos(3πt - 67)

y(t) = 0.097 sin(3πt - 67) + 0.051 cos(6πt + π/4 -78)

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Drake needs 144 ft² (squared feet) of fabric to make the 8 ft long and 18 ft tall sail.

The area (square units) of two lengths is the product of the multiplication of the two lengths.

The area refers to the space occupied by a two-dimensional object or structure.

Areas are stated in square feet to show the squared units occupied by such objects.

The length of a sail = 8 feet

The height of the sail = 18 feet

The square area = 144 ft² (8 x 18)

Thus, Drakes requires a fabric measuring 144 ft² (squared feet) to make the sail.

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Answer:

it is written as 5(3x+4)

Answer:

B

Step-by-step explanation:

1.20x + 3.60 < 9.60

1.20x < 9.60 - 3.60

1.20x < 6

x < 6 ÷ 1.20

x < 5

Answer:

$47.76

Step-by-step explanation:

77 : 100 = x : 207.65

x = (207.65 * 77)/100

x = 159.8905

final price = 207.65 - 159.8905 = 47.7595= $47.76

Answer:

Step-by-step explanation:

Simplify the radical by breaking the radicand up into a product of known factors, assuming positive real numbers.

Answer:

Slope = - 2

Explanation step by step:

Answer:

Subtract 3 3/4 from 10 1/2.  Note that the LCD is 4, so 10 1/2 = 10 2/4.

What is    10 2/4

              -  3 3/4

-------------------------

                    ?

Since 2/4 is smaller than 3/4, you must borrow 1 from that 10.

Now your problem looks like   9 6/4

                                              -3 3/4

                                            ----------

                                                6 3/4   (answer)

The remnant of the board is 6 3/4 feet long.

Step-by-step explanation:

Step-by-step explanation:

10 + x = 30

or, x = 30 - 10

x = 20

Option c, d, f are true about the chi-square goodness of fit test.

Explanation:

a. It is common to use one-sided alternative hypotheses when performing the chi-square goodness of fit test.

FALSE, there is no such thing as one sided in chi-square goodness of fit test.

b. The chi-square test statistic follows a Poisson null distribution.

FALSE, chi square is a distribution of its own more like normal distribution.

c. It compares an observed frequency distribution with an expected frequency distribution.

TRUE, because this is what is done in chi-square test.

d. The null hypothesis is that there is no difference between the observed and expected values.

TRUE

e. The degrees of freedom are k - 1, where k is the number of classes.

FALSE, because k is the number of parameters and not the number of classes.

f. The nature of the expected frequency distribution depends on the probability model on which it is based.

TRUE, this is a fact line because the model whose hypothesis testing we are following we will follow expected frequency of that model only.

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Answer:

3 feet

Step-by-step explanation:

All 4 sides are equal so 12/4=3

As per given data of printing, the total number of pages print by printing center during the week is equal to 39,954 pages.

As given in the  question,

Number of copies of 26 pages article print by printing center is equal to 1,233 copies

Number of copies of 12 page article print by printing center is equal to 658 copies

Total number of pages print by printing center during this one week is equal to

= ( 1233 × 26 ) + ( 658 × 12 )

= 32,058 + 7896

=39,954 pages

Therefore, for the given data of printing, the total number of pages print by printing center during the week is equal to 39,954 pages.

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