PLS PLS, PLS HELP OMG I POSTED THIS QUESTION 2 TIMES ALREADY PLS SOMEONE HELP!!! I PUT ALL OF MY POINTS PLS Set up and solve an equation to find the value of x. Then find the measurement of the missing angle in DAB.

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

If sec theta = 5/3 and the terminal point determined by theta is in quadrant 4, then

How do you determine if an ordered pair is a solution to a given equation?