Kerry’s grandmother, mrs. reynoso, is 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 on the first of each month, the $40 monthly fee for guitar lessons is withdrawn from the account.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