Question

A hair salon charges a fixed rate of $25.00 haircut and then an additional $15 for any other service. Write a function to model the cost of services there and then determine how many services you had if you were charged $115

Answer 1

Let x be the number of additional service.

Total Cost = 25 + 15x

If the total cost is $115,

115 = 25 + 15x
15x = 115 - 25
15x = 90
x= 6

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Answer: You had 6 additional services.
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Answer 2

A) f(x) = 15x + 25; f(0) = 25