Rewrite the equation 3r - 6 = 39 by factoring the side that contains the variable r. Pls help

Which point is a solution to the inequality shown in this graph (-3,-3)(3,-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

Solve x+3y=6 and 4x-6y=6 by elimination . show work !