This table represents a quadratic function. Х
у
1
3
3
-3
5
-5
7
-3
9
3
Which statement about this function is true?
A.
The value of a is positive, so the vertex is a maximum.
B.
The value of a is positive, so the vertex is a minimum.
C.
The value of a is negative, so the vertex is a maximum.
D.
The value of a is negative, so the vertex is a minimum.

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

Abcd is a square. what is the measure of angle bac

Which of the following are independent events? a) knowing that it is going to rain tomorrow, and bringing an umbrella to schoolb) knowing that you have to get up early tomorrow, and going to bed before 9 p. mc) knowing that it is going to rain tomorrow, and going to bed before 9 p. md) knowing that you have a test in school tomorrow, and studying thw night before