How do perform the equation x-(4x-2y)-5y

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

I'm confused on this could anyone me and show me what i need to do to solve it.

The numbers on a football field indicate 10 yard increments. you walk around the perimeter of a football field between the pylons. you walk a distance of 30623 yards. find the area and perimeter of the indicated regions. write your answers as mixed numbers, if necessary. a. one end zone: perimeter: yd area: yd2 b. the playing field (not including end zones): perimeter: yd area: yd2 c. the playing field (including end zones): perimeter: yd area: yd2