The wait time of a line t hours after a store opens is given by the expression. 40x−12x+2340x−1  x+23   what does the value 23 represent?a. the total number of people in line b. the total rate of change in people per hour c. the rate at which people join the line d. the number of people in line when the store opened

Me what is the value of x? showing work would be appreciated - ! : )

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

Find the distance between (0,5) & (-4,2)