Question

Hugh has to earn at least $400 to meet his fundraising goal. He has only 100 books that he plans to sell at $8 each. Which inequality shows the number of books, x, Hugh can sell to meet his goal?

20 ≤ x ≤ 400
40 ≤ x ≤ 100
50 ≤ x ≤ 400
50 ≤ x ≤ 100

Answer 1

If he sells all his books at $8 each, he'd make $800. But he only needs to sell half of those books if he wants to earn half of $800, which he does. So selling 50 books would be ok. Your choice is the third one down, which says, in words, that he needs to sell at least 50 books to make at least $400.

Answer 2

The answer to this problem is 50 ≤ x ≤ 100.