For questions 15 - 17, evaluate. Let f(x) = 3x*, g(x) = 2x -7, h(x) = 4x2 + 3, and m(x) = 3x + 8. (Use appropriate notation in your final answerl] 15) hig(8)) 16) mig(3)) 17) f(g(2)) 18) An online movie store is having a sale. You decide to open up a credit card and buy four DVDs. The store is offering two discounts: $15 off the purchase of any four DVDs in the store I . 10% off your purchase when you open a charge account a) Write a function f to model the $15 off discount and a function g to model the 10% off discount. b) Use composition of functions to find the c) Use composition of functions to find the sale price of $85 worth of DVDs when the sale price of $85 worth of DVDs when the $15 discount is applied before the 10% 10% discount is applied before the $15 discount. discount. d) Which order of discounts gives you a better deal? Explain. Review @ Let f(x) = 12x2 - 3x + 2 and g(x) = x -1. Perform the indicated operation. 20) 21) ( (x) . 9(x) 19) ((x) - g(x) g(x)