199 Solve each equation or inequality. 107. x + 4 = 7 108. 2 - x = 3 109. ` 7 2 - 3x ` - 9 = 0 110. ` 8x - 1 3x + 2 ` - 7 = 0 111. 5x - 1 = 2x + 3 112. x + 10 = x - 11 119. 4x - 12 Ú -3 120. 7 - 2x … -9 115. 7x - 3 74 116. ` 1 2 x + 2 3 ` 63 113. 2x + 9 … 3 114. 8 - 5x Ú 2 121. x2 + 4x … 0 122. x2 + 4x 70 117. 3x + 7 - 5 65 118. 7x + 8 - 6 7 -3 Write each statement using an absolute value equation or inequality. 123. k is 12 units from 6. 124. p is at least 3 units from 1. 125. t is no less than 0.01 unit from 5. Chapter 1 Test Solve each equation. 1. 31x - 42 - 51x + 22 = 2 - 1x + 242 2. 2 3 x + 1 2 1x - 42 = x - 4 3. 6x2 - 11x - 7 = 0 4. 13x + 122 = 8 5. 3x2 + 2x = -2 6. 12 x2 - 9 = 2 x - 3 - 3 x + 3 7. 4x x - 2 + 3 x = -6 x2 - 2x 8. 23x + 4 + 5 = 2x + 1 9. 2-2x + 3 + 2x + 3 = 3 10. 23 3x - 8 = 23 9x + 4 11. x4 - 17x2 + 16 = 0 12. 1x + 322/3 + 1x + 321/3 - 6 = 0 13. 4x + 3 = 7 14. 2x + 1 = 5 - x 15. Surface Area of a Rectangular Solid The formula for the surface area of a rectangular solid is S = 2HW+ 2LW+ 2LH, where S, H, W, and L represent surface area, height, width, and length, respectively. Solve this formula for W. 16. Perform each operation. Write answers in standard form. (a) 19 - 3i2 - 14 + 5i2 (b) 14 + 3i21-5 + 3i2 (c) 18 + 3i22 (d) 3 + 19i 1 + 3i 17. Simplify each power of i. (a) i42 (b) i -31 (c) 1 i19 CHAPTER 1 Test
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