Question

At a university, Todd deposits $100 into his cafeteria account. He spends $5 on dinner every day. Seth deposits $140 into his account. He spends $5 on lunch and $5 on dinner every day. After how many days will Todd and Seth have the same amount of money in their accounts? 16 8 4 2

Answer 1

The answer is 8 days.

Explanation:

By applying the correct equations to Todd and Seth's balances for each day we end up with Todd and Seth having an equal balance in their accounts by day 8, alternatively, we can show that Todd and Seth have the same amount of money in their accounts by day 8 with this table

Day - Todd - Seth

1 - 95 - 130

2 - 90 - 120

3 - 85 - 110

4 - 80 - 100

5 - 75 - 90

6 - 70 - 80

7 - 65 - 70

8 - 60 - 60