Which property does this represent? -3 x 1 = -3 a. additive inverse b. multiplicative inverse c. additive identity d. multiplicative identity

In the diagram of circle a what is m

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 of the following is the true for f(x) = 5cos