Concept explainers
In Exercises 39—48, use Cramer's Rule (if applicable) to solve each system of equations.
[Hint: For Exercises 47 and 48, let u =
Want to see the full answer?
Check out a sample textbook solutionChapter 6 Solutions
College Algebra
- For Exercises 19–26, simplify each expression and write the result in standard form, a + bi. 8 + 3i 19. 4 + 5i 20. -4 - 6i 21. 9 - 15i 22. 14 6. -2 -3 -18 + V-48 23. - 20 + V-50 14 - V-98 25. - 10 + V-125 24. 26. 4 10 -7arrow_forwardClassify the quadratic forms in Exercises 9–18. Then make a change of variable, x = Py, that transforms the quadratic form into one with no cross-product term. Write the new quadratic form. Construct P using the methods of Section 7.1. 11. 2x² + 10x1x2 + 2x3arrow_forwardAll I need is 4,5,6 please and thank youarrow_forward
- In Exercises 3–4, use the order of operations to simplify each expression. 8 - 3? ÷ 9 |-5| - [5 - (18 - 6)]? 3. 4. 4 (2 – 9)° + 32 ÷ 1 + 3 5. Simplify: 3 - [2(x – 2) – 5x].arrow_forwardIn Exercises 5–8, determine if the columns of the matrix form a linearly independent set. Justify each answer.arrow_forwarda= = (1, 0, 1), b = (2, 1, -1) and c = (1,-1,4). Calculate |ax (b + c).arrow_forward
- In Exercises 5–8, use the definition of Ax to write the matrix equation as a vector equation, or vice versa. 5. 5 1 8 4 -2 -7 3 −5 5 -1 3 -2 = -8 - [18] 16arrow_forwardIn Exercises 5–8, use the definition of to write the matrix equation as a vector equation, or vice versa.arrow_forwardQ/use Gaussian Elimination method to find the value of a, aa2 a3? 6a, + (155)a, +(5525)a, +(225125)a, = 6.000677 (155)a, +(5525)a, +(225125)a, +(9790625)a, =154.851 (5525)a, +(225125)a, +(9790625)a, +(442503125)a, = 5517.846 (225125)a, + (9790625)a, +(442503125)a, + (20515015625)a, = 224816.7arrow_forward
- Algebra & Trigonometry with Analytic GeometryAlgebraISBN:9781133382119Author:SwokowskiPublisher:CengageCollege Algebra (MindTap Course List)AlgebraISBN:9781305652231Author:R. David Gustafson, Jeff HughesPublisher:Cengage Learning
- Big Ideas Math A Bridge To Success Algebra 1: Stu...AlgebraISBN:9781680331141Author:HOUGHTON MIFFLIN HARCOURTPublisher:Houghton Mifflin Harcourt