Which if the following represents the area of a rectangle whose length is x+1 and whose width is x+11

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

Solve 3x-18=2y and 5x-6y=14 by elimination or substitution . show all !

What is the axis of symmetry of the function f(x)=-(x+ 9)(x-21)