What is -6k+7k (combine like terms)

show work !!

When 142 is added to a number the result is 64 more times the number my options are 35 37 39 41

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.

Which number line correctly shows 0.8 + 0.3?