A construction company charges $2 per cubic foot plus an overhead charge of $30 to lay a concrete driveway. Write the function that represents the total cost of laying a driveway for any number of cubic feet.
A)C(x) =2(x + 30)
B)C(x) = 2 + 30x
C)C(x) =2x + 30
D)C(x) = 32x

Question

Quizplus · Accepted Answer

The cost of laying a driveway depends on the number of cubic feet, which is given by the variable x. The cost per cubic foot is $2, so the product of 2 and x gives us the cost of concrete. The overhead charge is a flat fee of $30, which is added to the cost of concrete. Thus, the function that represents the total cost of laying a driveway is given by C(x) = 2x + 30.

A Construction Company Charges $2 Per Cubic Foot Plus an Overhead