In the school cafeteria, students choose their lunch from 3 sandwiches, 3 soups, 4 salads and 2 drinks. how many different lunches are possible for a student who choose exactly 1 sandwich, 1 soup, 1 salad, and 1 drink?

Which graph represents the following piecewise defined function?

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

3x + 4y = 5 x- 3y = -7 solve by substitution