Part 1

Jack opens a bank account with $80 and decides to deposit $25 each month into the account.

Which equation can be used to find the number of months after which Jack will have $405 in his account?

Answer Choices

405=25n+80


405=25n−80


405=80n−25


405=80n+25

Part 2

After how many months, will Jack have $405 in his account?