A rental car costs a one time fee of $30 and then an additional $15 for each day it is rented.  If the Webb family's total bill was $135, how many days did they rent the car?

We can solve this problem by setting up an equation.

The total cost of renting the car is given by the formula:

\[
\text{Total cost} = \text{One-time fee} + (\text{Cost per day} \times \text{Number of days})
\]

Let's define the number of days the Webb family rented the car as $ d $. According to the problem:

- The one-time fee is $30.
- The cost per day is $15.
- The total bill was $135.

So, the equation becomes:

\[
135 = 30 + 15d
\]

Now, solve for $ d $:

1. Subtract 30 from both sides:

\[
135 - 30 = 15d
\]
\[
105 = 15d
\]

2. Divide both sides by 15:

\[
d = \frac{105}{15} = 7
\]

Thus, the Webb family rented the car for **7 days**.

Would you like more details or have any questions?

Here are 5 related questions:
1. What would the total cost be if they rented the car for 10 days?
2. How much would they pay if there was no one-time fee and only the daily rate?
3. How many days could they rent the car if they had a budget of $200?
4. What if the one-time fee increased to $50? How many days could they rent with the same total bill?
5. If they rented the car for half a day, how would the cost change?

**Tip:** When solving equations, isolate the variable step by step, performing inverse operations.

A rental car costs a one-time fee of $30 and then an additional $15 for each day it is rented. If the Webb family's total bill was $135, how many days did they rent the car?

Learn how to solve a rental car cost problem with a total cost of $135, a one-time fee of $30, and a daily cost of $15. This step-by-step guide shows how to use linear equations and algebraic techniques. Suitable for Grades 6-8 students.

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