Question

Two friends rent a paddle boot to go sightseeing in Washington, DC. The friends party a onetime fee of $7 for 2 life jackets and are charged $20 for every hour they use the paddle boat. Which expression represents the total cost to rent the life jackets and the paddle boat for h hours

Answer 1

Let h be the amount of hours that the life jackets and the paddle boat are used.

Since the two friends must pay $20 for every hour, then the amount charged for h hours is:

$20h$

On the other hand, they must pay a onetime fee of $7 additional to the cost for using the equipment for h hours. Then, add 7 to the expression 20h to find the total cost:

$7+20h$

Therefore, the expression that represents the total cost to rent the life jackets and paddle boat for h hours, is:

$20h+7$