Question

Mrs. Kang gave Caleb a collection of 25 marbles. Each month Caleb adds 4 marbles to his collection. Which inequality can be used to find m, the number of months after starting his collection when Caleb will have at least 70 marbles in his collection?

Answer 1

17 and 1/2 months ago.

Answer 2

I did the math and got an answer of 17.5

Explanation:

I divided 70 by 4 and got a result of 17.5. This probably means Caleb started his collection about 17 and 1/2 months ago. (I apologize if it's wrong)