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3 years ago

7

The ratio of boys to girls in the 9th grade is approximately 7 to 9. There are 228 girls. How many boys are there?

1 answer:

Keith_Richards [23]3 years ago

7 0

Answer:

Approximately 177 boys

Step-by-step explanation:

Let

x ----> the number of boys

y ----> the number of girls

we know that

$\frac{x}{y}=\frac{7}{9}$

isolate the variable x

$x=\frac{7}{9}y$ ----> equation A

$y=228$ ----> equation B

substitute equation B in equation A

$x=\frac{7}{9}(228)$

$x=177.33$

therefore

Approximately 177 boys

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