Answer:
![11x + 18 \leq 40](https://img.qammunity.org/2022/formulas/mathematics/college/4i8m4j62zniegs1ev75q2lqesp562vkqst.png)
Explanation:
She can buy x illy flowers, and each illy flower costs $11.
She wants to buy a pair of red rose flowers for $18 and spend the rest on lly flowers. Each lily flower costs $11.
This means that the total amount she will spend is:
![18 + 11x](https://img.qammunity.org/2022/formulas/mathematics/college/y1cz8p6cwvef17p6uahajciinhb4dxu5k6.png)
Amanda has $40 to spend on flowers.
This means that her total spending can be at most $40, which means that:
![11x + 18 \leq 40](https://img.qammunity.org/2022/formulas/mathematics/college/4i8m4j62zniegs1ev75q2lqesp562vkqst.png)
This is the inequality that models this situation.