Question

A plumber charges a $75 flat fee for jobs lasting up to an hour and $30 for each hour of labor after the first hour. Which expression models the cost of a job lasting h hours, when h is greater than 1?

A) 75 + 30 h

B) 75 + 30 (h minus 1)

C) 75 h + 30

D) 75 (h minus 1) + 30

Answer 1

B as it is so ye

Explanation:

Answer 2

B) 75 + 30(h - 1)

Explanation:

flat fee = 75

additional charge in the first h (when h = 1) = 0

additional charge after the first hour (when h > 1) = 30 per h

Therefore, expression modelling this is: 75 + 30(h - 1)