Question

The cost of having a window fixed is $100 plus $20 per hour of labor. Using h for the number of hours of labor, write an expression that represents the total cost.

A.) 100 + $\frac{20}{h}$

B.) 120h

C.) 20+100h

D.) 100+20h

Answer 1

Answer:

D

Step-by-step explanation:

The $100 is constant and the hourly cost (expressed in h) is 20 dollars, To calculate the total costs you multiply $20 by the amount of hours, so 20h and add 100.

Therefore the answer is D.

Answer 2

Answer:

(D) 100 + 20h

Step-by-step explanation:

Fixed Cost = $100

Variable cost = $20 per hour

Find the variable cost for h hours:

1 hour = $20

h hour = $20h

Find the total cost:

Total cost = 100 + 20h

Answer: (D) 100 + 20h