Calculați a + b – c pentru: a) a = 2√3 – 5, b = 3√2 – 2√3, c = –5 + 3√2. b) a = 2 – √5 , b = – 4√7 + 2√5 , c = √5 – 4√7.

Simplify the expression and find the missing terms. the simplest form of has in the numerator and in the denominator.

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

The table shows the results of three plays in a football game. what is the net result of the three plays? football game 1st play 5 yards 2nd play -9 yards 3rd play 12 yards