Use a graphing calculator or other technology to answer the question. Which quadratic regression equation best fits the data set?

yˆ=179.246x2−20.213x+0.728

yˆ=0.728x2+20.213x+179.246

yˆ=0.728x2+0.564x+179.246

yˆ=0.728x2−20.213x+179.246
x y
4 109
6 88
9 52
15 42
18 50
21 78
23 98

What is 1/2 x (6 x 4)+3 + 2 show your work

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

Angle xyz is formed by segments xy and yz on the coordinate grid below: a coordinate plane is shown. angle xyz has endpoints at 3 comma negative 1 and 6 negative 2 and 3 comma negative 3 and measures 36.87 degrees. angle xyz is rotated 270 degrees counterclockwise about the origin to form angle x′y′z′. which statement shows the measure of angle x′y′z′?