Question

Val rented a bicycle while she was on vacation. She paid a flat rental fee of $55.00, plus $8.50 each day. The total cost was $123. Write an equation you can use to find the number of days she rented the bicycle

Answer 1

8 days

Explanation:

Let the number of days she rented bicycle be "b"

The total cost is fixed cost + variable cost.

Fixed cost = 55

Variables cost = 8.50 each day for b days, that is 8.50b

So, total cost is:

Total Cost = 55 + 8.50b

We know total cost is 123, so we can write:

123 = 55 + 8.50b

Now, we solve for b:

`123 = 55 + 8.50b\\123-55=8.50b\\68 = 8.50b\\b = (68)/(8.50)\\b=8`

So, she rented the bicycle for 8 days