for the summer reading club, xavier is required to read 2 books every week. what line represents this requirement? line a line b line c line d

The number of possible solutions of a polynomial can be found by looking

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 shows the correct solution of the equation 1/2a+2/3b=50, when b=30?