Practice A For use with pages 428-435

Let f(x) = 2x + 3, gU) = x2 - 1, and «x) = i±-l. Find the indicated value. 15. /W-6))

14. A(g(4))

13. /(g(D)

^Y-i-i 0 ^,.\>

5(

/tc/0- ^-

Let f(x) = 2X"1, g(x) = 2x + 5, and Wx) indicated operation.

. Perform the 21. /WO)

19. /(g(*))

$&^-^&^

a

^xt6

22.

,-H

Let f(x) = 2x + 2, g(x) = x2, and MX) = the operation.

State the domain of

25.

26.

f(x)+g(x)

h(x)-f(x)

g(x)

27.

PS XV 2. 30.

29. A(gW)

2-

S •

31. Profit A company estimates that its cost and revenue can be modeled by the ftmctions C(x) = 0.6* + 15,000 and R(x) - 1.25* where x is the number of units produced. The company's profit P is modeled byP(x) = R(x) - C(x). Find the profi equation and determine the profit when 500,000 units are produced.

15000 500,000