Which of the following is not an elementary row operation (ERO)? A. (Eq) + (Eq)
B. (Eq): (Eq)
C. -2(Eq,) ►
D. 3(Eq) + (Eq)

Xto the second power plus 14x plus 48. what are the factors? we are doing factoring trinomials with a=1

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

2y= 3 2 x−2 y = − 1 3 x + 1 y=− 3 1 x+1