Jeri says that she can express the sixth-graders' progress on Day 2 in two ways using equivalent fractions 1/4 or 2/8 of the goal. Why do BOTH correctly describe the sixth-graders' progress on Day 2?

Guys i really need or i have to stay late up night

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.

Angles r and s are complementary. the measure of angle r is 31 degrees. which equation can be used to find angle s?