The sum is type answer as integer proper fraction or mixed number simplify answer

What is the inverse of the function f(x) = 2x + 1?

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

Olga used 100 ounces of flour to make 225 muffins. how many ounces of flour will be used to make 300 muffins?