Which events are dependent? a. a number cube is rolled. then it rolled again
b. a student's name is chosen from a roll sheet
c. you choose a card and put it aside. then choose another card.
d. you flip a coin and get heads. you flip it again and gets tail.
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Which expression is equivalent to? assume x > 0 and y > 0.

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

Consider the proof. given: segment ab is parallel to line de. prove: what is the missing statement in step 5?