Each week, alfonso earns $85 every shift he works at the theater and $15 for every dog-walking job. he uses the expression 85x + 15 y to keep track of his earnings. part b. how many terms are in the expression what are they and how do you know? part c. which term in the expression shows the total learned from the dog walking jobs

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