You would like to construct a 400-square-foot rectangular garden along your driveway. The fencing on the driveway side costs $15 per linear foot, while the fencing for the other three sides costs $8 per linear foot. Write an expression for the cost of the enclosed rectangular garden as a function of the length L of the garden.

Question

You would like to construct a 400-square-foot rectangular garden along your driveway.	The fencing on the driveway side costs $15 per linear foot, while the fencing for the other three sides costs $8 per linear foot.	Write an expression for the cost of the enclosed rectangular garden as a function of the length L of the garden.

A · Answer

x+3y=400 15x+8*3y=L 15(400-3y)+8*3y+L

Steve · Answer

Not quite... The cost C is C = 8(2W+L)+15L since LW=400, = 8(2(400/L)+L) + 15L = 8(800/L + L) + 15L = 6400/L + 23L

TAN · Answer

Thank you Steve :)