Question

A store is selling cookies for$8 for 12 bags how muchwill it cost if you want to buy 30 for your class?

Answer 1

Set a proportion

$8/12 bags= x/30 bages
12*2.5=30
8*2.5=20=x

Final answer: $20

Answer 2

$20

Explanation:

We have given that : 12 bags cost $8

To find: cost of 30 bags

Solution : We know, 12 bags cost =$8

so, 1 bag cost =$
`(8)/(12)=(2)/(3)`

now, 30 bags cost = $
`30*(2)/(3)`

hence, 30 bags cost =$20