Question

Diego started a savings account with $120. Every month, he deposits $15 into the account. He wants to know the number of months, m, until his account has a balance of at least $200. Which inequality represents this situation?

Answer 1

6 months.

Explanation:

The equation to help with this problem is

y = mx + b

200 = 15x + 120. He had 120 to start with and he adds 15 a month. He wants to know when he will have 200. The x is what we are looking for.

200 = 15x + 120 Subtract 120 from both sides

80 = 15x Divide both sides by 15

x = 5 1/3 months. We will have to wait until month 6.