Someone plz me i don't have a clue what the answer is?

Simplify 15(x - 4)(x -1)-3(x + 4)(x - 1) with steps

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.

The length of a rectangle plus its width is 24 cm. the area is 143 square cm. what are the length and width of the rectangle?