316 Chapter 3 Systems of Linear Equations and Inequalities 25. Given the matrix A A £ 1 2 1 4 0 1 5 6 3 † 3 2 0 § a. Write the matrix obtained by multiplying the first row by 4 and adding the result to row 2. b. Using the matrix obtained in part (a), write the matrix obtained by multiplying the first row by 5 and adding the result to row 3. For Exercises 26–27, solve by using the Gauss-Jordan method. 26. 27. 5x 4y 34 x y z 1 x 2y 8 2x y 0 2y z 5 Chapters 1–3 Cumulative Review Exercises 1. Simplify. 2. Simplify. 2332 817 52 4 734 21w 52 312w 12 4 20 For Exercises 3–5, solve the equation. 3. 4. 5. 512x 12 213x 12 7 218x 12 1 2 1a 22 3 4 12a 12 4 02x 3 0 9 For Exercises 6–11, solve the inequality. Write the answer in interval notation if possible. 6. 7. 8. 9. 10. 3y 21y 12 6 8 4x 7 16 or 6x 3 9 4x 7 16 and 6x 3 9 0 3x 9 6 5 0x 4 0 1 6 11 11. 4 6 02x 4 0 1 6 12. Graph the solution set. 5 4 y 543 2 3 1 1 2 3 4 5 x 3 2 4 5 1 2 1 13. Identify the slope and the x- and y-intercepts of the line 5x 2y 15. x 5y 5 For Exercises 14–15, graph the equations. 1 3 x 4 14. y 15. x 2 5 4 y 1 54 3 1 2 3 4 5 21 1 2 3 4 5 x 3 2 5 4 y 1 54 3 1 2 3 4 5 21 1 2 3 4 5 x 3 2 16. Find the slope of the line passing through the 14, 102 16, 102. points and 17. Find an equation for the line that passes 13, 82 12, 42. through the points and Write the answer in slope-intercept form.
miller_intermediate_algebra_4e_ch1_3
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