The sum of the interior angles of a triangle is 180 the second angle of a triangle is 45 more than the first and the third angle is twice the first

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 true for the relation f(x)=2x^2+1

In the diagram below? p is circumscribed about quadrilateral abcd. what is the value of x