Linda needs to buy some pencils. brand a has a pack of 48 pencils for $7.97. brand b has a pack of 72 pencils for $9.88. find the unit price for each brand. then state which brand is the better buy based on the unit price. round your answers to the nearest cent.

Can someone me with this problem . show your work .

Solve 2x+y=3 x+y=5 in substitution method

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