W − y if w = 20 and y = −8

Aschool puts on a play. the play costs $1,200 in expenses. the students charge $4.00 for tickets. there will be one performance of the play in an auditorium that seats 500 people. what is the domain of the function that shows the profit as a function of the number of tickets sold?  

Collin did the work to see if 10 is a solution to the equation r/4=2.4

Me i'm timed right now! there's 4 answer