parallel lines m and n intersect parallel lines x and y, representing two sets of intersecting railroad tracks what angles do the tracks intersect

Evaluate the expression for the given value of the variable 2×(c2-5) for c=4

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

41/17 as a decimal rounded to the nearest hundredth