9. Erin has created an expression to calculate the total money raised from selling cups of lemonade. The expression they came up with was 0.75n, where n represents the number of
cups Erin sold.
Calculate the value of this expression for n=14. Show your work.
Give an interpretation of the value you found above in the context of this problem.

PLEASE HELP 20 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

Multiply. write your answer in simplest form. 3/8 x 5/7

The graph of y = ax^2 + bx + c is a parabola that opens up and has a vertex at (0, 5). what is the solution set of the related equation 0 = ax%2 + bx + c?