Hi so what is 3^2x +21^2​

Suppose you just purchased a digital music player and have put 8 tracks on it. after listening to them you decide that you like 4 of the songs. with the random feature on your player, each of the 8 songs is played once in random order. find the probability that among the first two songs played (a) you like both of them. would this be unusual? (b) you like neither of them. (c) you like exactly one of them. (d) redo () if a song can be replayed before all 8 songs are played.

There are 45 questions on your math exam. you answered 810 of them correctly. how many questions did you answer correctly?

What is the name of a polygon that has four congruent sides and theses angle measures 60,120,60,120?