Last year 40 people adopted a mantee. this year 30% more people adopted a manger. how many more people adopted a mantee

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

Bring the fraction a/a-4 to a denominator of 16-a^2

Xy x xy if a and b are positive integers such that a*b=9 and b*a=72 what is the value of a/b