I need help with this page, it is adding linear expressions. Oh, and it would be lovley if you show work, because I need to know how to do it.

Given f(x)= 9x+1 and g(x)=x^3, choose the expression (f*g)(x)

Which of these numbers of simulations of an event would be most likely to produce results that are closest to those predicted by probability theory? 15, 20, 5, 10

Acolony contains 1500 bacteria. the population increases at a rate of 115% each hour. if x represents the number of hours elapsed, which function represents the scenario? f(x) = 1500(1.15)" f(x) = 1500(115) f(x) = 1500(2.15) f(x) = 1500(215)