Suppose that the function f(x)=5.2+0.8x represents the cost of mailing an object that weighs x pounds. How much would it cost to mail an object that weighs 36 pounds? (Note: Express the answer in dollas. cents.)
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When can u say there is no solution for a system of linear inequalities? explain your answer and show with a system and graph

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

Inez has a phone card. the graph shows the number of minutes that remain on her phone card a certain number of days.