Create a linear function f(x), whose graph has the given slope that meets the given condition. slope of 7,f(7)=1. the equation of the line is y=?

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 is the solution to the inequality? 2 3/52 1/15 b< 3 2/15 b> 3 2/15

How do i simply this expression (quadratic formula basis) on a ti-84 or normal calculator?