Answer please, i've been stuck for a while. thanks!

News cameras take an overhead picture of a crowd at an outdoor event journalist then count the total number of people in the picture and use the sample of estimate the total number of people in the crowd this process is an example of

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

What are the solutions of the system? solve by graphing. y = -x^2 - 3x + 2 y = -2x + 2