It takes a printer 2 1/2 min to print 24 black-and-white pages and 4 color pages. it takes the same printer 3 1/4 min to print 30 black-and-white pages and 6 color pages. let b represent the time in minutes needed to print a black-and-white page and c represent the time in minutes needed to print a color page. the shown system represents the given problem. 24b+4c=2 1/2 30b+6c=31/4 solve the system to complete the statement. it takes the printer min to print a black–and–white page and min to print a color page.

Problems and applications q5 four roommates are planning to spend the weekend in their dorm room watching old movies, and they are debating how many to watch. here is their willingness to pay for each film: willingness to pay (dollars) shen antonio dmitri jake first film 10 9 8 3 second film 8 7 6 2 third film 6 5 4 1 fourth film 4 3 2 0 fifth film 2 1 0 0 within the dorm room, the showing of a movie a public good. if it costs $12 to rent a movie, the roommates should rent movies in order to maximize the total surplus. suppose the roommates choose to rent the optimal number of movies you just indicated and then split the cost of renting equally. this means that each roommate will pay $ .