Answered

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

Answer :

calculista

Answer:

Approximately 177 boys

Step-by-step explanation:

Let

x ----> the number of boys

y ----> the number of girls

we know that

[tex]\frac{x}{y}=\frac{7}{9}[/tex]

isolate the variable x

[tex]x=\frac{7}{9}y[/tex] ----> equation A

[tex]y=228[/tex] ----> equation B

substitute equation B in equation A

[tex]x=\frac{7}{9}(228)[/tex]

[tex]x=177.33[/tex]

therefore

Approximately 177 boys

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