What is the property is shown 5+9=9+5

Z4=289 there should be 4 answers total 2 whole numbers and either 2square root or imaginary number answers

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?  

What is r i 4.5+10r=-6.5 with work pls