Which is the completely factored form of 3x^2-12x-15

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

Which expression shows the sum of the polynomials with like terms grouped together

Hardest math question of all time can you solve the equation. check for extraneous solutions.9∣9-8x∣ = 2x+3