Question

Shelley's pet food store sold one customer 5 peanut butter biscuits for $3. She sold another customer 7 beef treats for $4.20. Write a proportion that compares the sales of these two items, and find the cross products. The cross products are both equal to

Answer 1

21

Explanation:

Answer 2

Given that,

Shelley's pet food store sold one customer 5 peanut butter biscuits for $3. She sold another customer 7 beef treats for $4.20.

For peanut, the cost is ratio is

`(5)/(3)`

For beef, the ratio is

`(7)/(4.2)`

If we take cross product of these items,

`(5)/(3)=(7)/(4.2)\\\\5* 4.2=3* 7\\\\21=21`

It implies, that the sale is in true proportion. From the cross product, we find that it is equal.