Miss Kito is building a rectangular pen for her lea. She will use the side of her house for one wall of the pen;therefore she will not need any fencing on that side. On the other three sides, she will use special fencing that costs $12 per foot . She wants the entire enclosed area to be 2400 square feet. Lastly, she needs four corner that costs $5 each ? Let x represent the length of each side of the pen perpendicular to the house and let y represent the length of the side of the pen parallel to the house. Write a function c(x) for the cost of the materials for the llama pen in terms of x. Simplify

Please explain and thank you