Answer: A).
![65w+74\geq635](https://img.qammunity.org/2019/formulas/mathematics/middle-school/vsjzc2vpbbl43pufeoh7f2mc58psbpyk0n.png)
Explanation:
Given: The amount saved for trip = $75
The decided amount to save per week = $65
Let 'w' denotes the numb er of week.
Since, you need at least $635 to go on a trip to Washington, DC.
then we have the following inequality:
![65w+74\geq635](https://img.qammunity.org/2019/formulas/mathematics/middle-school/vsjzc2vpbbl43pufeoh7f2mc58psbpyk0n.png)
Hence, the inequality shows the number of weeks, w, you need to save to be able to go on the trip is
![65w+74\geq635](https://img.qammunity.org/2019/formulas/mathematics/middle-school/vsjzc2vpbbl43pufeoh7f2mc58psbpyk0n.png)