Answer: The maximum amount of rides that Earl can go on is 9.
Step-by-step explanation: Earl only has 75 to spend so you cannot go over it. Each ride should be represented by x because it is an unknown value. 37.95 is a constant. The equation is 75 = 4.25x + 37.95. Subract 37.95 and you get 39.05 = 4.25x. Divide by 4.25 and you get 9.18823529412 = x. You cannot go on part of the ride so remove the decimal value. The answer is 9 rides.