Mack bought two cds for $14.50 each, one wallet for $12.00, and four picture frames at $7.50 each. what is the average cost of each item rounded to the nearest dollar?

Simply 8x squared + 5(7x squared- x) - 2x =

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

Leslie started last week with $1200 in her checking account. during the week, she wrote the checks below.