If a tax percentage is 8% how much money would something $30 be?

Consider the proof. given: segment ab is parallel to line de. prove: what is the missing statement in step 5?

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?  

Express in the simplest form: (x^2+9x+14/x^2-49) / (3x+6/x^2+x-56)