HELP asap
the pic saids it all

For f(x)=2x+3 and g(x)=x^2- 8 find (f+g) (x)

If p(a) = 0.70 and p(b) = 0.20, then a and b are independent events if

Jessica is organizing a guided tour of the rain forest. the average profit per person that the touring company makes is given by the rational expression 18x+35/x, where x is the number of people going on the tour. what does the numerator of this rational expression represents?