Answer:
![43.13 = 5.25h + 9](https://img.qammunity.org/2022/formulas/mathematics/college/44sjm1hwm9ejbles4tngk4wfk70q1linbt.png)
Explanation:
Let's solve this by making an equation.
$9 for the helmet, and $5.25 per hour.
h will stand for hours, C will stand for Amanda's cost.
![C = 5.25h + 9](https://img.qammunity.org/2022/formulas/mathematics/college/kwo61t836e38layx50chwro87ifzacb3wh.png)
Now, substitute in what we learned from the problem.
![43.13 = 5.25h + 9](https://img.qammunity.org/2022/formulas/mathematics/college/44sjm1hwm9ejbles4tngk4wfk70q1linbt.png)
This is an equation you can use to solve for the hours.