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Peter wrote the equation 7h – 5(3h – 8) = –72 to model the number of hours it takes to dig a well to a level of 72 feet below sea level. How many hours will it take to dig the well?

A4
B10
C14
D17

Verified Answer :

giselahinojosa

the answer is 14 aka: (c)

FamousJay

7h-5(3h-8)= -72

Times the 5 and the 3 and the 5 times 8 then you have this

7h-15+40= -72

-8+40 = -72

     -40   -40

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-8     =      -112

-8             -8

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Divide 8 by both sides

h    =       14

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