PLEASE HELP Consider the following geometric series:
Sn = a + ar + ar? + ar3 +...+ar+-2 + art-1

Show that the sum of the series is equivalent to a: (look at image)

What is the slope of a line that is perpendicular to y = 3x + 1

I’m which figure is point g an orthocenter

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