Use the rules of multiplication by powers of 10 to calculate 3 x 100

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

What is the greater volume 72 quarts or 23 gallons

Asystem of equations has 1 solution.if 4x-y=5 is one of the equations , which could be the other equation ?