Working as a waiter, michael earns $6.50 per hour plus tips. last night he received $36.50 in tips and earned a total of $65.75. how many hours did he work?

Given the following statements, which is the best

Angles r and s are complementary. the measure of angle r is 31 degrees. which equation can be used to find angle s?

In a singing competition, there are 150 participants. at the end of each round, 40% of the participants are eliminated. how many participants are left after n rounds?