Aldonza needs to fence in a corral with area 600 square feet (see illustration below). One side (one of the x sides) needs a stronger fence to keep the cows out--materials will cost $8 per foot for this side. The other three sides can be fenced with less expensive materials at $4 per foot.

Use the area information above and the "area of a rectangle" formula to solve for y and use substitution to find an equation to express Aldonza's cost as a function of only x:
C(x) =

Question

Aldonza needs to fence in a corral with area 600 square feet (see illustration below). One side (one of the x sides) needs a stronger fence to keep the cows out--materials will cost $8 per foot for this side. The other three sides can be fenced with less expensive materials at $4 per foot.

Use the area information above and the "area of a rectangle" formula to solve for y and use substitution to find an equation to express Aldonza's cost as a function of only x:
C(x) =