If u can answer both questions that would be great but if not just one will help

Using the side-splitter theorem, daniel wrote a proportion for the segment formed by luke segment de. what is ec?

Solve for x and y: 217x + 131y = 913; 131x + 217y = 827

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.