Mathematics High School

The ratio of boys to girls in Ella's class is 3 to 4. The ratio of boys to girls in Minh's class is 4 to 5. Each class has a total of 20 girls. How many boys are in each class? *

Answers

Answer 1

Answer:

15 and 16

Step-by-step explanation:

i hop it helps

Answer 2

There are 15 boys in Ella's class and 16 boys in Minh's class.

What are ratio and proportion?

A ratio is a comparison between two similar quantities in simplest form.

Proportions are of two types one is the direct proportion in which if one quantity is increased by a constant k the other quantity will also be increased by the same constant k and vice versa.

In the case of inverse proportion if one quantity is increased by a constant k the quantity will decrease by the same constant k and vice versa.

Given, The ratio of boys to girls in Ella's class is 3 to 4. The ratio of boys to girls in Minh's class is 4 to 5.

Each class has a total of 20 girls and assuming each class has a total of x students.

∴ 4x/7 = 20.

4x = 140.

x = 35.

No. of boys = 15.

5x/9 = 20.

5x = 180.

x = 36.

No. of boys = 16.

learn more about proportion here :

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Related Questions


y= {x + 19; (-9, 4)

Answers

Answer: No solution

Step-by-step explanation:

I don’t know if you want to see if (-9,4) is infinitely many solution, one solution, or one solution

Is 2/5 and 8/20 equivalent

Answers

yes!
explanation:
8 divided by 4 equals 2 and 20 divided by 4 is 5

Answer:

Yes, they are.

Step-by-step explanation:

i need the x intercepts for (x+3)(x + 7) = 0

Answers

Answer:

-3, -7

Step-by-step explanation:

either x + 3 = 0 --> x = -3

or x + 7 = 0 --> x = -7

Answer:

(-3,0) and (-7,0)

Step-by-step explanation:

Find the slope and y-intercept of the line in each graph.

Answers

1 slope is 2/4 and the y is 0
2. Slope is -2/3 and the y is 2
Hope this helps

factor each expression

24x +8y


HELP ASAP
WRONG ANSWERS REPORTED

Answers

I think your answer would be 3(3x+y)

Will spent $15 for 12 pounds of granola. What is his unit rate in dollars per pound?

Answers

Answer:

1.25

Step-by-step explanation:

to find the unit rate you have to find out how much one pound will be so you divide 15 by 12 and you get 1.25

Explain the steps to solving a two-step inequality.

Answers

Answer:

Step-by-step explanation:

Tina bought a new shirt for $20. Her mom said she will pay 15% of the total cost. How much will she pay?

Answers

Answer:

3

Step-by-step explanation:

a boat traveled 19 kilometers east and 53 kilometers south, how far from its starting position is it?

A 25-foot ladder rest against a house at a point 24.1 feet above the ground. How far away from the house is the base of the ladder?​

Answers

Answer:

56.3

6.6

Step-by-step explanation:

Answer:

A boat traveled 19 kilometers east and 53 kilometers south, how far from its starting position is it?: √3170≈56.3 km.

A 25-foot ladder rest against a house at a point 24.1 feet above the ground. How far away from the house is the base of the ladder?: √44.19≈6.65 ft.

Step-by-step explanation:

For these questions, we will need to use the pythagorean theorem: a²+b²=c², where a and b are the legs of the right triangle and c is the hypotenuse.

A boat traveled 19 kilometers east and 53 kilometers south, how far from its starting position is it?

In this question, we are looking for the hypotenuse.

19 and 53 are the legs of the triangle, so we can plug it into the equation:

19²+53²=c²

361+2809=c²

3170=c²

√3170=c

56.30275304103699, or approximately 56.3 km.

A 25-foot ladder rest against a house at a point 24.1 feet above the ground. How far away from the house is the base of the ladder?​

25 is the hypotenuse since it is leaning sideways and is the longest side. 24.1 is one of the legs.

In this question, we are looking for one of the legs.

Let's plug it in: 24.1²+b²=25²

580.81+b²=625

Subtract 580.81 from both sides.

b²=44.19

b=√44.19

6.647555941848102, or approx. 6.65 ft.

16x^2 + 10x — 27 = -6x + 5

What are the solutions to this equation?

Answers

Answer:

x=1 or x=−2

Step-by-step explanation:

16x2+10x−27=−6x+5

Step 1: Subtract -6x+5 from both sides.

16x2+10x−27−(−6x+5)=−6x+5−(−6x+5)

16x2+16x−32=0

Step 2: Factor left side of equation.

16(x−1)(x+2)=0

Step 3: Set factors equal to 0.

x−1=0 or x+2=0

x=1 or x=−2

Jackson invested $750 into a savings bond that earned 3% interest each month. At the same time, he also began saving money in a savings account. The value of the savings account is represented by f(x) = 1,000 + 25x, where x represents the number of months since the account was opened. At the end of how many months did the value of the savings bond first begin to exceed the value of the savings account?

Answers

Answer:

33 Is the ANSWER

What is the area of the circle below?
10 ft

Answers

Answer:

Circle

Solve for area

A=π r^2

r =Radius

You about this first:

The circumference of a circle is its perimeter or distance around it. It is denoted by C in math formulas and has units of distance, such as millimeters (mm), centimeters (cm), meters (m), or inches (in). It is related to the radius, diameter, and pi using the following equations: C = πd. C = 2πr.

Step-by-step explanation:

Hope it is helpful....

HELP PLEASE





What are the steps in solving this system? (write them in WORDS and solve.)

5x - 2y = 4
10x - 2y = 14

Answers

5x - 2y = 4 (1)
10x - 2y = 14 (2)

divide (1) to (2),
-5x = -10
x = 2

Then, to find the y you can substitute the x = 2 to (1),
5(2) - 2y = 4
10 - 2y = 4
- 2y = 4 - 10
- 2y = - 6
y = 3

So, the x = 2 and y = 3

The circumference of a circular table top is 20 π centimeters. what is the area of the tabletop.

Answers

Step-by-step explanation:

Hope the above solution helps

Find the value of x.

Answers

Answer:

x = 14

Step-by-step explanation:

83 * 2 = 9x + 40

166 = 9x + 40

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Answer:

A

Step-by-step explanation:

Answer:

785 m

Step-by-step explanation:

Brainliest, pleeeeaseee??? Thanks I love YOUUUUUU

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Answers

Answer:

16

Step-by-step explanation:

24/8=3

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what is the answer of this 5-x=7-2x

Answers

Answer:

x = 2

Step-by-step explanation:

5 - x  = 7 - 2x

-x + 2x = 7 - 5

x = 2

Answer:

x=2

Step-by-step explanation:

5-x=7-2x

5+x=7 (Move 2x to the other side)

x=2 (Minus 5 from both sides)

Check:

5-x=7-2x

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(Correct)

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Answers

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Step-by-step explanation:

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Answers

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Answers

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Step-by-step explanation:

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Answer:

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Step-by-step explanation:

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Answer:

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Step-by-step explanation:

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I need help with math if you don't know the answer get out of the question and don't answer it and give the wrong answer or some link or even say "I don't know" or anything like that it's not fair to me cause it a waste of my points I will report your if you do that :) have a nice day and stay safe

Answers

Answer:

the answer is 5 3/8

Step-by-step explanation:

the common denoiminator of 4 and 8 is 8 so you multiply 3 by 2 like you did 4 to get 8 and you multiply 5 by 1 like you did 5 to get 5 and you add it all together

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