Question

2) How much money, in dollars, is available on his card
after he takes 1 ride?

Answer 1

What’s the question because how much did he start with and what’s the cost

Answer 2

So is this just 40$ - 2.50$? If so it would be 37.50. If you need more than that this equation will work 40 - 2.5r = m

R = how many rides he takes
M = Ending money amount.