Two students recently took algebra class tests. the students are at different schools but wanted to compare their performance. the first student scored 80 on the test. her class average was 90 with a standard deviation of 10. the second student scored 70. her class average was 50 with a standard deviation of 10. which student did better?

Which undefined geometric term is described as a location on a coordinate plane that is designed by an ordered pair (x, y) ?

Rectangle leg this 11feet and perimeter of 38feet what is the width of the rectangle in feet

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