Suppose your grades on four science exams are 99, 86, 76, and 95. what grade do you need on your next exam to have a 91 average on the five exams? a. 89.4 b. 93 c. 90 d. 99

Liam's parents are driving three times as fast as liam is biking, but they left later than he did. if his parents caught up with him two hours after he left, how much later than liam did they leave?

Which of the following is true for the relation f(x)=2x^2+1

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