Which relation is a function?
a. x y
4 -2
5 -3
6 -2
7 -3
b. x y
3 10
2 20
3 30
4 40
c. x y
-5 2
-5 3
-10 4
-10 5
d. x y
10 15
20 25
8 30
20 35

Which of these numbers of simulations of an event would be most likely to produce results that are closest to those predicted by probability theory? 15, 20, 5, 10

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

Micheal is 4 times as old as brandon and is also 27 years older than brandon. how old is micheal