Idk anything about math please I need help

Idk Anything About Math Please I Need Help

Answers

Answer 1

Answer:

21 boys

Step-by-step explanation:

2:3=14:x you cross multiply this to find the amount of boys

2x=42

x=21

Answer 2

There are 21 boys in the class.

Basically, solve what you have there with cross-multiplication.

2x = 14 x 3

2x = 42

Then divide both sides by 2. (edited it bc didn't say what you actually had to do)

2x ÷ 2 = 42 ÷ 2

x = 21.

There are 21 boys in the class.


Related Questions

How do you do this question?

Answers

Answer:

S(50) = 0

Step-by-step explanation:

The initial condition is S(0) = 0, so start at the origin.  The slope there is approximately 1.  So as t increases by a small amount, S increases by the same amount.  Continuing this logic, we end up tracing the vector field until we get to t=50, where S is approximately 0.

Each little tickmark is a slope value telling you which direction to go. If you place yourself at the origin (0,0) then the tick mark here tells us to go roughly in the northeast direction. As you step forward to the northeast just a tiny bit, the slope value changes to aim more toward the east (rather than north). For more information, check out Euler's method. Specifically it's Euler's method dealing with slope fields.

The diagram below shows what could be each step of this process. Each red dot is a stepping stone, so to speak, going from (0,0) to (50,0). This is an approximation. Without the actual function F(t, S), it's hard to say where exactly S(50) is located. But S(50) = 0 is a fairly good guess I think. MathPhys has a great diagram showing what could be the solution for S(t) given the initial condition S(0) = 0. Note how they drew a curve through all of the red points I've marked.

If we know that the length of time it takes a college student to find a parking spot in the library parking lot follows a normal distribution with a mean of 3.3 minutes and a standard deviation of 1 minute, find the point in the distribution in which greater than 75.8% of the college students in trying to find a parking spot in the library parking lot.
A. 2.6 minutes
B.2.8 minutes
C.3.2 minutes
D.4.2 minutes

Answers

Answer:

i believe its c

Step-by-step explanation:

A savings bond currently made Jamar $2,112.64 worth of interest in 7 years. If the investment gained 5.5% annual simple interest each year, approximately how much was the bond originally bought for?

Answers

Answer:

$5487.38

Step-by-step explanation:

Given that:

Interest currently made = $2112.64

Time = 7 years

Rate of interest = 5.5% annual

To find:

The price for which the bond was originally bought ?

Solution:

We need to find nothing but the principal amount.

First of all, let us have a look at the formula for Simple Interest.

[tex]Simple\ Interest = \dfrac{PRT}{100}[/tex]

Where [tex]P[/tex] is the principal amount

[tex]R[/tex] is the Rate of Interest

[tex]T[/tex] is the time for which the investment is made

Let us put the given values in the formula:

[tex]2112.64 = \dfrac{P\times 5.5\times 7}{100}\\\Rightarrow P =\dfrac{2112.64\times 100}{5.5\times 7}\\\Rightarrow P =\dfrac{211264}{38.5} \\\Rightarrow \bold{P =\$5487.38}[/tex]

PLEASE HELP IT IS 3:30 AM


FIND THE EQUATION OF THE LINE

USE EXACT NUMBERS

y= ( )x + ( )​

Answers

Answer:

The answer is y = -1/3x + 5 !

Step-by-step explanation:

If you observe the line, the y-intercept is 5, from the point in the graph (0,5). From that point, we can see that the rise over run is -1/3. Thus, y = -1/3x + 5.

PLEASE HELP ME ASAP
Which graph best represents the solution set of y > 3x - 4

Answers

Answer:

Step-by-step explanation:

THE MIDDLE ONE

It would be either A or C they look the exact same this question is weird but it’s shaded through -4.

Expression A: 3(x + 2) Expression B: 3x + 6....... Which statement does not show that these expressions are equivalent? O A. Substituting any value of x makes the expressions equivalent B. The expressions name the same number regardless of the value of x. O C. Both expressions involve addition. O D. 3(x+2) can be rewritten as 3x + 6 using the distributive property. SUBMIT E PREVIOUS​

Answers

Answer:

D. 3(x+2) can be rewritten as 3x + 6 using the distributive property

Step-by-step explanation:

Given

[tex]3(x + 2) = 3x + 6[/tex]

Required

Explain

From the list of given options, option D answers the question.

This is because, the expression above involves distributive property and only option D correctly states that.

A distributive property is:

[tex]a*(b + c) = a*b + a * c[/tex]

In this case:

[tex]a = 3[/tex]  [tex]b = x[/tex]   and [tex]c = 2[/tex]

So:

[tex]a*(b + c) = a*b + a * c[/tex]

Substitute values for a, b and c

[tex]3*(x + 2) = 3 * x + 3 * 2[/tex]

[tex]3(x + 2) = 3x + 6[/tex]

Answer:

C. Both expressions involve addition.

Step-by-step explanation:

I tried it, and it was correct

Please help it’s due soon and I don’t wanna be even more behind, also I’ll mark brainliest

Answers

Answer:

B. (2, 2)

Step-by-step explanation:

The coordinate (2, 2) is the only thing they share in common, both lines intersect each other on that coordinate.

Select " Yes" or " No" to indicate whether the ordered pair is on the graph of the function f(x)= -9^x+1. ( Make sure you look at the picture. Need help Asap Please ​

Answers

Answer:

yes

no

no

Step-by-step explanation:

Factor the algebraic

12a+20=


Answers

Answer:

4(3a+5)

Step-by-step explanation:

When you factor an algebraic expression, you divide the initial expression by a common factor to produce your answer.

have a gr8 day (:

Answer: 4(3a+5)

Explanation: Factor 4 out of 12a +20.

Please need help thank

Answers

Answer:

10

Step-by-step explanation:

Answer:

I think it’s 10:)

Step-by-step explanation:

John is eating out with friends, and it is his turn to pay gratuity. The bill for the food is $48.53. If he plans to tip 20%, what should the tip be?

Answers

Answer:

$9.76

Step-by-step explanation:

20% is 1/5 of the bill. The answer is 48.53 +( 48.53*1/5) which is 9.76 so the $9.76

Plz mark brainliest if correct!

Hope this helps

Answer:

Step-by-step explanation: well you can just plug it into a calculator.

the answer is 9.706 or 9.7 if you simplify it  and if you are rounding to the nearest tenth then its 10.

hope this helps!

Johnny took a test. All the questions have equal value. He answered 38 of the questions correctly. This was 95% of the questions. How many questions were on the test?

Answers

Answer:

40 questions

Step-by-step explanation:

38=.95x where x is the total tests

38/.95 = x

40 = x

Can anyone pls help? Will give brainliest if you're correct.

Answers

Answer:

2 ninths, or 2/9

Step-by-step explanation:

Multiply -2/3 by -1/3 to get the answer

Answer: f=2/9

you have to multiply 2/-3 and -3/2f

Trust me it will work

In solving the problem 7(2x - 4) + 7 = 0 what order are the steps?

A. Distributive property, inverse, simplify
B. Inverse, combine like terms, inverse
C. Distributive property, combine like terms, inverse, inverse, simplify
D. Combine like terms, inverse, distributive property, simplify

Answers

I think the answer is C

Rewrite 12x-6y=48 in slope intercept form. Then identify the slope and initial value from your equation.

Answers

Slope = 2

x-intercept = 8/2 = 4

y-intercept = 8/-1 = -8.00000

answer : 8.00000

Answer: y=2x-8

Slope 2 initial value I’m guessing is the y intercept which is -8

Step-by-step explanation:

12x-6y=48

-12x -12x

-6y=-12x+48

Divide by -6

Y=2x-8

The LMC of 6 and 7 is

Answers

Answer:

6, 12, 18, 24, 30, 36. 42, 46, 52, 58, 64,

7, 14, 21, 29, 36

Your answer is 36.

Step-by-step explanation:

LCM means the multiple which the two numbers share with the least value. So, I just found the multiples of each number until I found the one which was common. If you would like me to explain this in more depth, tell me! I'd be glad to help.

whats the answer to this MARKING BRAINLIEST

Answers

Answer:

400 square feet

Step-by-step explanation:

20 x 20 = 400

HOPE THIS HELPS

PLZZ MARK BRAINLIEST

Answer:

400 square feet

Step-by-step explanation:

Area = length x width

A = lw

A = 20 x 20

20 x 20 = 400

Area = 400 ft^2

A car dealership sold 84 cars in April. The dealership wants to increase the number of cars sold by 25% in May. How many cars will the dealership need to sell to reach their goal?

Answers

Answer:

The car dealer must sell 105 cars in May to reach his goal.

Step-by-step explanation:

Given that the car dealer sold 84 cars in April, and wants to increase his May sales by 25%, to determine the number of cars he must sell to reach his goal it is necessary to perform the following calculation:

84 + (84 x 0.25) = X

84 + 21 = X

105 = X

Therefore, the car dealer must sell 105 cars in May to reach his goal.

The weight, in pounds, of a newborn baby tt months after birth can be modeled by W.W. The table below has select values showing the linear relationship between tt and W.W. Determine the weight of the baby at birth.

Answers

Answer:

12 pounds

Step-by-step explanation:

Please give me thanks

When you give me thanks

Have a good day :)

The weight of the baby at birth is 8 pounds.

Given,

The weight, in pounds, of a newborn baby tt months after birth, can be modeled by W.

The table below has select values showing the linear relationship between

t and W.

We need to determine the weight of the baby at birth.

The table is given as:

t        w

1         10

4.5     17

9        26

How do we read the tables given?

The table has two columns and it always has a relationship between them depending on the question.

Example:

Miles.        Hours

2.               3

6.               9

8.               12

Here we see that every 1-5 hours there's a mile increase.

We have,

W = weight of the baby

t = number of months.

From the table:

The baby weight-

At 1 month = 10

At 4.5 months = 17

At 9 months = 26

We see that,

In,

(4.5 - 1) = 3.5 months there is an increase of (17 - 10) = 7 pounds.

So we can write it as:

3.5 months = 7 pounds

1 month = 7/3.5

1 month = 70/35 = 10/5 = 2 pounds

This means in after every month there is an increase of 2 pounds.

We have,

1In the first month, the weight of the baby is 10 pounds.

And every month there is an increase of 2 pounds.

So,

The weight of the baby at birth is:

= 10 - 2

= 8 pounds

Thus the weight of the baby at birth is 8 pounds.

Learn more about finding relationships in a given table here:

https://brainly.com/question/28350476

#SPJ2

Write the following as a base-10 numeral in standard form.
4 x 105 + 2 x 102 + 7 =

Answers

9514 1404 393

Answer:

  400207

Step-by-step explanation:

Any calculator can form this sum for you. It is ...

  4×10^5 +2×10^2 +7

  = 400,000 +200 +7

  = 400207

12. F(x) = 4x squared

Answers

Answer:

y-intercept: [tex]y=0[/tex]

axis of symmetry: [tex]x=0[/tex]

vertex: [tex](0,0)[/tex]

Step-by-step explanation:

To find the y-intercept, set x = 0 and solve for y.

I am assuming f(x) = y

[tex]y=4x^2[/tex]

[tex]y=4(0)^2[/tex]

[tex]y=0[/tex]

The y-intercept of the equation is y = 0.

Now, for the axis of symmetry, you need the equation [tex]x=\frac{-b}{2a}[/tex]

In an equation.. [tex]y=ax^2+bx+c[/tex]

In this case, there is only an a, so plug in the values into the equation.

[tex]x=\frac{0}{2(4)}[/tex]

[tex]x=0[/tex]

The axis of symmetry is x = 0.

To find the vertex, change the format of the equation from standard form to vertex form.

Vertex form: [tex]y=a(x-h)^2+k[/tex]

The vertex is [tex](h,k)[/tex]

[tex]y=4x^2 = 4(x+0)^2+0[/tex]

[tex](h,k)=(0,0)[/tex]

The vertex in this case is (0,0).

Graphing makes things a lot easier. If you can graph it, all you have to do is look at the graph and the answers are all there!

Hope this helped you!

A market trader bought 100 loaves at 84p each

Answers

Answer:

8400p.

Step-by-step explanation:

I'm assuming you're asking about the total price of the loaves here. Please specify your question further next time.

(84*100)p

= 8400p

Hope that helped!

In a-d, choose whether the fraction and percent are equivalent.
50/33 and 117% yes or no (HURRY UP)

Answers

Answer: no

Step-by-step explanation:

117% equals 1.17 and 50/33 equals 1.51 repeating so they aren’t equal.

Ahhhhh why are people so smart

4 1/3 divided by 4/7

Answers

Answer:

The answer is 91/12 in exact form or 7 7/12 in mixed number form.

Step-by-step explanation:

Reduce the expression, if possible, by cancelling the common factors.

This is the answer for question problem

please answer i need help

Answers

Answer:

first answer is 9.84

Step-by-step explanation:

9.84 is the square root of 97, rounded to the nearest hundredth.

the legs measure 9 x 9 and 4 x 4 = 81 and 16.

81 + 16 = 97, so your answer is the square root of 27, which rounded to the nearest hundredth, equals 9.84. Rounding towards the nearest whole, 10 would be your best bet.

hope this helps!!

what is the value of tan(arrcos( -[tex]\sqrt{2}[/tex] /2)?

Answers

Answer:

tan(arrcos( -√2 /2)) = -1

(result in radians)

Step-by-step explanation:

Note: Enter your answer and show all the steps that you use to solve this problem in the space provided
Harry rides his bike 25 miles Karen rides her bike 25 miles Who rides farther?

Answers

Karen and Harry ride their bike in the same amount of miles.

So no one rides farther .

The steps i took was compare and contrast both of their miles and they were the same amount

you wrote ehte question wrong

-2(y-1)=9 what is the answer

Answers

Exact form: -7/2. Decimal form: -3.5 Mixed number form: -3 1/2

-2(y-1) = 9

Use distributive property:

-2y + 2 = 9

Subtract 2 from both sides

-2y = 7

Divide both sides by-2:

Y = -7/2

Does the ratio 15/12 and 5/4 form a proportion?

Answers

Answer:

yes

Step-by-step explanation:

5 times 3 is 15 and 12 and 15 and 12 divided  by  3 you will get 5/4

A surveyor observes that point A is located on level ground 25 feet from a flag pole. The base of the flagpole represents point B. Approximate the height of the flagpole to the nearest tenth of a foot when the angle between the ground and the top of the flagpole is:______.(a) 30° (b) 38° (c) 45°

Answers

Answer:

Step-by-step explanation:

The set up will give a right angled triangle

Given

Distance of point A from the flagpole = 25feet

If angle of elevation is 30°

Required

Height of flagpole (opposite)

Using TOA

tan theta = opp/adj

tan30° = opp/25

opp = 25tan30°

opp = 14.4feet

Hence the height of flagpole when the angle of elevation is 30° is 14.4feet

If angle of elevation is 38°

Required

Height of flagpole (opposite)

Using TOA

tan theta = opp/adj

tan38° = opp/25

opp = 25tan38°

opp = 19.53feet

Hence the height of flagpole when the angle of elevation is 38° is 19.5feet

If angle of elevation is 45°

Required

Height of flagpole (opposite)

Using TOA

tan theta = opp/adj

tan45° = opp/25

opp = 25tan45°

opp = 25feet

Hence the height of flagpole when the angle of elevation is 45° is 25feet

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