Let x be a nonzero number. X^-3 = ?

Can someone me with #s 8, 9, and 11. with just one of the three also works. prove using only trig identities.

Micheal is 4 times as old as brandon and is also 27 years older than brandon. how old is micheal

Awoman has 14 different shirts: 10 white shirts and 4 red shirts. if she randomly chooses 2 shirts to take with her on vacation, then what is the probability that she will choose two white shirts? show your answer in fraction and percent, round to the nearest whole percent.