Show your work. pleas quick
18. to enter a competition, students must score a total of at least 450 points on five qualifying tests. each test is worth 100 points. on the first four tests, your scores were 94, 88, 79 and 95. what are three possible scores you can earn on the last test to enter the competition?
19. a sales associate in a shoe store earns $325 per week, plus a commission equal to 4% of her sales. this week her goal is to earn at least $475. at least how many dollars’ worth of shoes must she sell in order to reach her goal?
20. write an inequality for the following statement: “you have to be at least 18 years old to vote.”
21. solve: |y + 8| ≥ 3
22. a ski shop owner surveys 200 people who ski or snowboard. if 196 people ski and 154 people do both activities, how many people snowboard?