"Which method would be the best to solve each system ? Explain why you chose that method." System A : 2x + 3y=9 at the bottom -3x+3y=-6 System B: x= 8-2y at the bottom y-x=4

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?  

Could someone with number 1 and 2

Can someone me with the property questions for 12 13 and 14 plz