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2 years ago

At a school the number of boys : number of girls = 11 : 9.

Mathematics

2 answers:

jenyasd209 [6]2 years ago

5 0

Answer:

1240

Step-by-step explanation:

the ratio is 11:9

let the number of girls be x, then the number of boys is x + 124

now

$\frac{x+124}{x} = \frac{11}{9}$

9x + 1116 = 11x

2x= 1116

x=558

so total number = x + (x+124) = 1240

gladu [14]2 years ago

4 0

Answer:

Step-by-step explanation:

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3 years ago

Read 2 more answers

Solve each equation using inverse operations: 1. 9w = -54 2. b - 12 = 3 3. n/4 = -11

katovenus [111]

Hello!

Answer:

1. $\boxed{W=-6}$

*The answer must have A NEGATIVE SIGN ONLY!*

2. $\boxed{B=15}$

*The answer must have A POSITIVE SIGN ONLY!*

3. $\boxed{N=-44}$

*The answer must have a NEGATIVE SIGN ONLY!*

Step-by-step explanation:

1. 9w=-54

First, you divide by 9 both sides of an equation.

9w/9=-54/9

Simplify.

-54/9=-6

W=-6 is the final answer.

____________________________________

2. b-12=3

First you add by 12 both sides of an equation.

b-12+12=3+12

Add by the numbers from left/right.

3+12=15

b=15 is the final answer.

__________________________________________

3. n/4=-11

First you multiply by 4 both sides of an equation.

4n/4=4(-11)

Multiply by the numbers from left/right.

4*-11=-44

n=-44 is the final answer.

_____________________________

Hope this helps you!

Have a great day! :)

-Charlie

Thanks!

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Answer:

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Step-by-step explanation:

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bija089 [108]

Answer:

Step-by-step explanation:

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