Please do Section 1-2, pages 17-18, exercises 12, 16, 18, 20, 24, 26, 28

EXERCISES Practice Find f(x] + g(x], f(x] - g(x], f(x) . g(x], and - (x] for each f(x] and g[x]. 11. /(x) = x2 - 2x 12. A(x) = 13. /(x) =- 3 x+1 X - 7 g(x) = x+9 g(x) = x2 - 1 g(x) = x-+ 5x 14. If f(x) = x + 3 and g(x) = x _ 5: find f(x) + g(x), f(x) - g(x), F(x) - g(x), and ()69. www.amc.glencoe.com/self_check_quiz Lesson 1-2 Composition of Functions 17 CONTENTS Find [fog][x] and [g f](x] for each f(x] and g(x]. 15. /(x) = x2 - 9 16. /(x) = -x - 7 g(x) = x+4 g(x) = x+6 17. /(x) = x - 4 18. /(x) = x- 1 g(x) = 3x2 g(x) = 5x2 19. /(x) = 2x 20. A(x) = 1+ x g(x)=x+x+1 g(x) = x+ 5x + 6 21. What are [fog](x) and [go f](x) for f(x) = x + 1 and g(x) = -? State the domain of [fog][x] for each f(x] and g[x]. 22. f(x) = 5x 23. /(x) = _ 24. /(x) = Vx - 2 g(x) = 13 g(x) = 7-x 1 S(x) = Ax Find the first three iterates of each function using the given initial value. 25. /(x) = 9 - xX0 = 2 26. ((x) = x+1;x, =1 27. f(x) = x(3 - x);x, = 1 Applications 28. Retail Sara Sung is shopping and finds several items that are on sale at 25% off and Problem the original price. The items that she wishes to buy are a sweater originally at Solving $43.98, a pair of jeans for $38.59, and a blouse for $31.99. She has $100 that her grandmother gave her for her birthday. If the sales tax in San Mateo, California, where she lives is 8.25%, does Sara have enough money for all three items? Explain