Question

The deposits Ginny makes at her bank each month form an arithmetic sequence. The deposit for month 3 is $150, and the deposit for month 5 is $180. Answer the questions below and show all work.

Answer 1

Hello, I have done this same math question before.

1. 15 dollars
2. Deposit=15*month+105
3. Deposit=15*12+105=$285
4. 500=15*month+105
    395=15*month
    26.33=month
    Round up to 27 for the nearest whole month, so month 27.

Hope this helps!