A cement delivery company charges $75.00 to deliver plus $3.00 per cubic foot of cement. wirte an equation to calculate the charge of 56 cubic feet.

Equation for the charge in terms of x cubic feet: C(x) = 75 + 3x

i) C(56) = 75 + 3(56) = $243

ii) 316 = 75 + 3x

Solve for x,

x = 80.3 ft^3

## Comments

A general contractor charges $316.00 for their concrete. how many cubic feet of concrete did they use?