Question

Your friend has $100 when he goes to the fair. He spends $10 to enter the fair and $20 on food. Rides at the fair cost $2.00 per ride. Which function can be used to determine how much money he has left over after x rides?

f(x) = -2x + 70

f(x) = 2x + 70

f(x) = -2x - 70

f(x) = -30x + $100

Answer 1

before entering the fair, your friend has 100
entrance fee = 10
food = 20

so she is left wid 70 before going to rides

Answer 2

A?

Answer 3

Yes !