How many arrangements of three letters can be formed from the letters of the word MATH if any letter will not be used more than once?

Do 12/14 and 8/10 have the same value? explain your answer.

Which of the binomials below is a factor of this trinominal? x^2-13+30

Four airplanes carrying a total of 400 passengersarrive at the detroit airport. the airplanes carry, respectively,50, 80, 110, and 160 passengers. a) one of the 400 passengers is selected uniformly at random. let x denote the number of passengers that were on theairplane carrying the randomly selected passenger. find var(x)for x as given in the problemb) one of the 4 airplane drivers is also selected uniformly atrandom. let y denote the number of passengers on the chosen driver’s airplane. find var(y) for y as given in the problem