Henry had a collection of 72 books. Exactly . of Henry's books were how-to-draw books. Henry gave of his how-to-draw books to his younger sister. How many books did Henry give to his sister?
a
O A. 6 books
OB. 11 books
OC. 9 books
D. 12 books

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

Which equation shows y= 3 4 x− 5 2 in standard form? a 4x−3y=10 b 3x−4y=10 c 3x−4y=−10 d 4x−3y=−10

Which shows one way to determine the facts of x3+4x2+5x+20 by grouping