Pls help me on this i don't know what to do ​

If square root x = -7, then x= -49 true or false

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?  

If we pull out the middle player of team a and the fourth player of the team b. what will be the force of team a and team b? what is their sum of forces