You have 10.50. You spend 4.50 of that 10.50 on admission. You take what you have, and subtract what you spent. That is 10.50-4.50. When you do that, you get 6.00. So, you now have 6.00 to spend. If you divide 6 dollars by the 5 rides, each ride costs $1.20. 1.20x the 5 rides equals 6.00, which is what you have left after you spend 4.50 on admission.
Because we know how large each hand is, we can multiply the number of hands by the amount of inches each one represents to find the total number of inches.
