Can someone help me solve and explain how to get this math problems

9. (12 pts) Let f(x) = 2x2 + x -4 and g(x) =1 - 2x. (a) Evaluate the function g -f for x = -3. That is, find (g -f)(-3). Show work. (b) Evaluate the function fg for x = -3. That is, find (fg)( -3). Show work. (c) Find the difference function (f -g)(x) and simplify the results. Show work. 10. (15 pts) (See textbook page 82 for definitions of the economic functions used in this problem.) The cost, in dollars, for a company to produce x widgets is given by C(x) = 6x + 3600 for x 2 0, and the price-demand function, in dollars per widget, is p(x) = 50 - 0.02x for 0 S x S 2500. (a) Find and interpret C(250). (b) Find and interpret C(250). (Note that C(x) is the average cost function.) (c) Find and simplify the expression for the revenue function R(x). (d) Find and simplify the expression for the profit function P(x). Note that p(x) and P(x) are different functions. (e) Find and interpret P(250), where P(x) is the profit function in part (d). Page 5 of 5 950 words " Foc