I think the third one on both part a and b can't be used to find the answer
Answer:
-2x^2+8x-31
Step-by-step explanation:
<span>No, this is not proportional. After 1 week she would have $280+$30=$310. After 2 weeks she would have $310+$30=$340. The proportional time is "2 to 1", but the proportional savings is $340 to $310, which is a different proportion.</span>