Respuesta :

musiclover10045

The ratio is saying for every 13 that are smiling, 2 are frowning.

Divide 65 smiling by 13:

65 / 13 = 5

Multiply 5 by 2 frowning = 10 were frowning.

carlosego

For this case we have the following proportion:[tex]\frac {13} {2} = \frac {x} {y}[/tex]

Where:

x: Variable that represents the students who were smiling

y: Variable representing students who were frowning

They tell us that:

[tex]x = 65[/tex]

So:

[tex]\frac {13} {2} = \frac {65} {y}\\13 * y = 2 * 65\\y = \frac {2 * 65} {13}\\y = 10[/tex]

Answer:

10 students were frowning

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