A small school employs 555 teachers who make between \$40{,}000$40,000dollar sign, 40, comma, 000 and \$70{,}000$70,000dollar sign, 70, comma, 000 per year. The newest teacher, Valerie, decides to teach part-time which decreases her salary from \$40{,}000$40,000dollar sign, 40, comma, 000 to \$20{,}000$20,000dollar sign, 20, comma, 000 per year. The rest of the salaries stay the same.
How will decreasing Valerie's salary affect the mean and median?

Abe is a triangle. can you use the sss postulate or the sas postulate to prove triangle abc = triangle aed? by sss only neither apply both apply by sas only

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 length of a rectangle plus its width is 25 cm. the area is 156 square cm. what are the length and width of the rectangle? separate the answers with a comma.