Question

Kerry’s grandmother, Mrs. Reynoso, is helping Kerry pay for guitar lessons. She has set up a special savings account to pay for the lessons. On the first of each month, the $40 monthly fee for guitar lessons is withdrawn from the account.

1. Grandmother Reynoso started the account with $300. Record the monthly balance in the account in the table.

Month

Balance

0

$300

1

2

3

4

Write an expression for the amount of money in Kerry’s guitar lesson account. Let x equal the number of months since Mrs. Reynoso deposited the initial $300.


Write an equation to determine when the account balance will be $100

Answer 1

Month 5 is when it will be at $100

I hope this helps!

Explanation:

x---0-----1-----2-----3----4-----5

y-300-260-220-180-140-100

y=40x+300