Question

A repairman charges $50 to diagnose a problem and $35 for each each hour he works to fix the problem. which equation can be used to model the total dollar amount, y, charged by the repairman to diagnose and fix a problem in x hours? A) y = 50x + 35 or B) y = 35x + 50 or C) y = 35(x + 50) or D) y = 50(x + 35)

Answer 1

If the repairman work x hours, then he will charge $35 an hour, so the total of $35*x. 
Add to the above amount the $50 we get $(50+35x).

The correct answer is then B.