Ay a carnival hamburgers cost $3.50 each and French fries cost $2.00 .A person spends $20.00 buying some hamburgers x and some French fries y to share with friends. Enter an equation to represent the purchase

An architect is designing a water fountain for a park she uses the given function to model the water jet flowing from the fountain nozzles where h(x) gives the height of the water jugs in feet x feet from the starting point h(x)=-1/20x+x+15