Answer:
9.6 hours.
Explanation:
Let x be number of hours.
We have been given that John pays $1.25 per hour to rent roller blades. The cost of renting roller blades for x hours would be
.
Since he admission fee is $8, so total cost of skating for x hours would be
.
To find the number of hours that John can skate in $20, we will equate
by 20 as:





Therefore, John can skate for 9.6 hours.