Question

I don't understand how to do this at all and I'm being timed

Answer 1

Given:

`\frac{8(1)/(2)\text{ pizzas}}{5\text{ salads}}=\frac{?}{10\text{ salads}}`

This means that 5 salads are needed for 8½ pizzas.

To find the missing value, cross multiply.

Thus , we have:

Let x represent the missing value

`\begin{gathered} \frac{8(1)/(2)\text{ }}{5\text{ }}=\frac{x}{10\text{ }} \\ \\ \text{Cross multiply:} \\ 10(8(1)/(2))=5x \\ \\ 85\text{ = 5x} \\ \end{gathered}`

Divide both sides by 5:

`\begin{gathered} (85)/(5)=(5x)/(5) \\ \\ 17\text{ = x} \end{gathered}`

Therefore, we have:

`\frac{8(1)/(2)\text{ pizzas}}{5\text{ salads}}=\frac{17\text{ pizzas}}{10\text{ salads}}`

ANSWER:

17 pizzas