5x-3y=-5 2x-3y=-11 solve for elimination

Sienna planned a trapezoid-shaped garden, as shown in the drawing below. she decides to change the length of the top of the trapezoid-shaped garden from 32 ft to 24 ft. which expression finds the change in the scale factor?

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

How to do this , and can some one explain