Caroline saves money in an arithmetic sequence: $350 the first year, another $550 the second, and so on. How much money does she save after 31 years?

Answer this 30 points and brainliest!

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

Find the greatest common factor of the followig monomials 21u^5v,3u^4v^6, and 3u^2v^5