Write the number in two forms 300,000+5,000+20+6

The equation respenting the left table is

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?  

The square root of 9x plus 7 plus the square rot of 2x equall to 7