Find values of x and y for which abcd must be a parallelogram. the diagram is not drawn to scale.

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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

W-16=-12 solve each one step equation plz

Factor these polynomials and explain how 1. 12x - 3x^2 2. 20 - 240x^2