The members of City Cultural Center have decided to put on a play Once a Night for a week there auditorium hold 500 people. by seeling tickets the members would like to raise $2,850 every night to cover all expensive let d represent the number of adult tickets sold at $7.50 let s represent the number of students tickets sold at $4.50 if all 500 seats were filled for a performance how many type of each ticket must have been sold for the members to raise exactly $2,850 at one performance there were two times as many students tickets sold as adult tickets if there were 360 tickets sold at that performance how much below the goal of $2,850 did ticket sales fall ​