Question

Melvin Delaney is an appliance repairman. Mrs. Ziegler calls asking how much it will cost to get her washing machine fixed. He tells her he charges $25 to come to her house, $35 for each hour of labor and then the cost of materials is added to the total price. If Melvin Delaney spends three hours working on Mrs. Zeigler's washing machine and charges her a total of $160, what was the cost of the materials? Use the equation c = 25 + 35t + m. where c is the total cost, t is the time in hours, and m is the price of materials.

Answer 1

$30

Step-by-step explanation:

$25 + $35(3) + m = $160

^3 hours worked

25 + 105 + m = 160

130 + m = 160

-130 -130

now subtract 130 from both sides

m = $30