Arepairman 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)