Please help me!! I've been stuck on this question for ages.

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

A. 90 degrees b. 45 degrees c. 30 degrees d. 120 degrees

John used linear combination to solve the system of equations shown. he did so by multiplying the first equation by -3 and the second equation by another number to eliminate the x-terms. what number did jonas multiply the second equation by? 4x-6y=23x+5y=11