What is the coefficient of the term 13a13a13, a in the expression 13a+ 6b13a+6b13, a, plus, 6, b?

What is the point-slope equation of a line with slope -5 that contains the point (6,3)

The center of a circle represent by the equation (x+9)^2+(y-6)^2=10^2 (-9,6), (-6,9), (6,-9) ,(9,-6)

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?