The angles of a triangle are 80°, 2x + 2°, and 5x°. what is the value of x? enter your answer in the box. answer today i really need to get an a

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

Which fraction is equal to 1hole and 2/5? a.3/5 b.75 c.57 d.73

Math i have no idea how to do a and b