I need help answering these questions.

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

Tom drove 206 miles in 3.9 hours. estimate his average speed.

4. bob solved the inequality problem below incorrectly. explain his error and redo the problem showing the correct answer. −2x + 5 < 17 −2x + 5-5 < 17-5 -2x/-2 < 12/-2 x < -6