Vector cc has a magnitude of 21.021.0 m and points in the −y‑−y‑ direction. vectors aa and bb both have positive y‑y‑ components, and make angles of α=43.4°α=43.4° and β=27.7°β=27.7° with the positive and negative x-x- axis, respectively. if the vector sum a+b+c=0a+b+c=0 , what are the magnitudes of aa and b?

1. what is the measure of ∠abc? what is the measure of ∠abd?

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.

How do you determine if an ordered pair is a solution to a given equation?