Answer:
![L + W \leq 9](https://img.qammunity.org/2021/formulas/mathematics/high-school/902b7mnu64jn6ym96z978yw0c5jow1bjus.png)
Explanation:
Given
Represent lifeguarding cars with L
Represent washing cars with W
--- at most
Required
Express the scenario as an inequality
First, we need to determine the number of hours Lauren can work.
This is calculated as follows:
![Total\ Hours = L + W](https://img.qammunity.org/2021/formulas/mathematics/high-school/ska1bxg6ps8rpk9n4csfi7lse8fz1l89a7.png)
From the question, we understand that the total hours cannot exceed 9 hours.
This can be expressed as
![\leq 9](https://img.qammunity.org/2021/formulas/mathematics/high-school/wh2rid2gwtoabu0yzjdsx5p2qq0sg6rwfx.png)
So, we have:
![Total\ Hours \leq 9](https://img.qammunity.org/2021/formulas/mathematics/high-school/wyo5rim577r664pwo2y8g41d9tt1zwskza.png)
Substitute L + W for Total Hours
![L + W \leq 9](https://img.qammunity.org/2021/formulas/mathematics/high-school/902b7mnu64jn6ym96z978yw0c5jow1bjus.png)