Dave has $15 to spend on an eight dollar book and two birthday cards cd for his friends how much can you spend on each card if you boys the same card for each friend

Which expression is equivalent to √ -80?

Find the slope of a line given the following two points

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