Write an expression that is equivalent to 7/8

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

In the triangles, bc =de and ac fe. if the mzc is greater than the mze, then ab isdfelth

Gabrielle's age is two times mikhail's age. the sum of their ages is 84. what is mikhail's age?