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Practice B

For use with pages 452-459 Solve the equation. Check your solution.

>1. + 3 = 12	2. ^-4=?,1	3.	3V5T+^- ^6
4. (2x -^1 3)^1/2 + 2 .*== 2 -	5. sVEx = i$	6.	3\Z4~-^3x — 21
7. t 7$jlx -4 4—b	8. V3x + 4 + | = 3	9.
Solve the equation. Check your solution. 10. ^ + 1 =?>2 . 11. 4^x + 2 = 0.		12.	^+7i5
13. (x + 4)^1/3 - 2 -'-6	14. +3 = 11	15.	-2 = -4
16. -2^2* + 5 + 7 = 15	17. ~(5x + 1)^1/3 + | = 4	18.	6^ "- 3 + ^2 = 5

Solve the equation. Check for extraneous Solutions.

5/3

243

19. *

21. 2x^5/? = -64

23. (2x + Uf³ r 3 Ł"l3

20.    + 3 = 11

22.    (jc-2)^3/4 - 8

24. (3* + 21)^4/3 + 9 = 90

Solve the equation. Check for extraneous Solutions.

20. V* + 3 =||4*-8 Al

29.    1= V3jc - 3

31. *M-2 = V2x-+7

28. VV3i% 3 = v2x - 7 30. ^3x+9 =^jc + 6 32. V2x + 3 = 1 + Vx + 1

In Exercises 33-35/use the following information.

Velocity The velocity of a free falling object isgiven by V — \jlgh where Fis velocity (in meters per seeond), g is aeceleration cjue to gravity (in meters per second sąuared), and h is the distance (in meters) the object has fallen. The value of g depends on which body/planet is attracting the object. If an object hits the surface with a velocity of 30 meters per second, from what height was it dropped in each of the following situations?

33.    You are on Earth where g = 9.81 m/s².

34.    You are on the moon where g =,1.5£m/s².

35.    You are on Mars where g jjjg 3.72 m/s².

Copyright © by McDougal Littell, a división of Houghton Mifflin Company.