Solve the problem.
-The cost for labor associated with fixing a washing machine is computed as follows: There is a fixed charge of $25 for the repairman to come to the house, to which a charge of $20 per hour is added. Find an equation that
Can be used to determine the labor cost, C, of a repair that takes x hours. Write the final answer in the form C =
Mx + b.
A) C = 45x
B) C = 20x + 25
C) C = 25x + 20
D) C = -20x + 25

Question

Quizplus · Accepted Answer

The labor cost consists of a fixed charge of $25 plus an additional charge of $20 per hour. This can be represented by the equation C = 20x + 25, where x is the number of hours of labor. This equation is in the form of y = mx + b, with m = 20 (the slope or rate of change) and b = 25 (the y-intercept or fixed charge). So the answer is choice B. The fixed charge of $25 is added to the hourly charge of $20 multiplied by the number of hours (x). This can be written as C = 20x + 25, which is in the form of C = Mx + b. Therefore, the correct choice is B.

Solve the Problem. -The Cost for Labor Associated with Fixing a Washing Machine