Solve trig equation: 9 + cot^(2) x = 12

Find the greatest common factor of the followig monomials 21u^5v,3u^4v^6, and 3u^2v^5

Many newspapers carry a certain puzzle in which the reader must unscramble letters to form words. how many ways can the letters of emdangl be arranged? identify the correct unscrambling, then determine the probability of getting that result by randomly selecting one arrangement of the given letters.

Which value of y will make the inequality y< -1 false?