a) The mechanic charges $35 an hour plus parts to fix the car. If parts cost $90 and it took 5 hours to do job, find total cost of repair? Illustrate the solution and answer.
b) The dump truck went through scales at junk yard. When it arrived, truck weighed 18,792 pounds. When truck was leaving, it had to weigh again and it weighed 16,948 pounds after dumping its load. How much truck's load weighed? Illustrate the solution and answer.