Question

Rafael is trying to book a graduation party. The party pavilion charges $100 for the first 10 people, $150 for more than 10 and up to 20 people, $250 for more than 30 and up to 40 people, and $275 for more than 40 people and up to 50 people. If Rafael wants to spend $250 for this party, how many people can he invite?

30 < x ≤ 50
20 < x ≤ 40
30 < x ≤ 40
20 < x ≤ 30

Answer 1

The $250 rate applies to more than 30 and up to 40 people, so Rafael can invite 31–40 people. Answer: 30 < x ≤ 40.