Question

Shannon is putting a fence around the garden,except where there is a gate that is 3 feet wide. One foot of the fence cost $43. The cost of the gate is $ 128. Write an expression that represents the total cost of the fence and the gate. Explain how you determined your expression. Enter your expression and your explanation in the space provided.

Answer 1

C= 43(x-3)+128
the cost is 43 dollars per foot of the perimeter. It is unknown so we will use x for feet. we do not include the 3 feet of the fence so we have 43(x-3) so we do not count the length of the fence twice. The gate will be required and will cost 128.