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
Cameron G.
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"#

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