Question

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?

A. 4
B. 10
C. 14
D. 17

Answer 1

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

Answer 2

the answer is 14 aka: (c)