Answer:
(b) 3 hours
Explanation:
You want the amount of time Tiffany can rent a canoe if her charges are $7, calculated as $2.50 + 1.50 per hour.
Equation
An equation for the time Tiffany can rent is ...
cost = fixed charge + hourly charge × hours
7 = 2.50 + 1.50 × hours . . . . . . use the given numbers
4.50 = 1.50 × hours . . . . . . . . . subtract 2.50
3 = hours . . . . . . . . . . . . . divide by 1.50
Tiffany can use the boat for 3 hours if she can pay $7 for rental.