In Mrs. Smith's pie recipe the amount of blueberries used is directly proportional to the number of pie. If 4 pies requires 6.8 pounds of blueberries, how many blueberries are needed to bake 13 pies?

1 Answer
Jul 6, 2016

7.65" pounds"

Explanation:

For this we will use p to represent the number of pies and b to represent the weight of blueberries, in pounds. 4 pies requires 6.8 pounds of blueberries so:
4 " Pies"=6.8 " Pounds of blueberries"
or
4p=6.8b
Now to find out how many blueberries are in 13 pies, we substitute the value 13 for p
4(13)=6.8b

52=6.8b

b=52/6.8

b=7.65" pounds"