I dont know this one help needed thanks.

What is the length of the segment joining the points at (4,5) and (6,-2) round to the nearest tenth if necessary

If 1 is divided by the sum of y& 4. the result is equal to 3 divided by 4 .find the value of m?

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