omg I am literally begging you plz help me I have no idea what to do and I need to get these correct so please help me (also plz show your work) don't answer if you don't know what your doing -_-

Can someone me with this problem . show your work .

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

Find the solution(s) to the system of equations. select all that apply y=x^2-1 y=2x-2