Mathematics

13 May, 01:53

Jake hires a septic system contractor to dig trenches for his new septic tank. The cost to hire the contractor is a fixed cost of $160 plus an additional $70 per hour. Which expression below describes the average cost of an x-hour job?

A. 160x+70/x dollars per hour

B. x/70x+160 dollars per hour

C. 70x+160/x dollars per hour

D. 160+70/x dollars per hour

+5

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