Is this correct?
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For f(x)=2x+3 and g(x)=x^2- 8 find (f+g) (x)

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?  

For the following geometric sequence, find the recursive formula. {-80, 20, -5, } i need : ')