Table of contents
- 0. Review of Algebra4h 16m
- 1. Equations & Inequalities3h 18m
- 2. Graphs of Equations43m
- 3. Functions2h 17m
- 4. Polynomial Functions1h 44m
- 5. Rational Functions1h 23m
- 6. Exponential & Logarithmic Functions2h 28m
- 7. Systems of Equations & Matrices4h 6m
- 8. Conic Sections2h 23m
- 9. Sequences, Series, & Induction1h 19m
- 10. Combinatorics & Probability1h 45m
7. Systems of Equations & Matrices
Determinants and Cramer's Rule
Problem 33b
Textbook Question
In Exercises 33 - 36, write each matrix equation as a system of linear equations without matrices.
![Matrix equation for exercise 33 in college algebra, chapter on systems of equations.](https://lightcat-files.s3.amazonaws.com/problem_images/2d8629ed10b47e4f-1678242649132.jpg)
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1
Identify the matrix equation: \( \begin{bmatrix} 4 & -7 \\ 2 & -3 \end{bmatrix} \begin{bmatrix} x \\ y \end{bmatrix} = \begin{bmatrix} -3 \\ 1 \end{bmatrix} \).
Recognize that this represents a system of linear equations.
The first row of the matrix equation corresponds to the equation: \( 4x - 7y = -3 \).
The second row of the matrix equation corresponds to the equation: \( 2x - 3y = 1 \).
Write the system of equations: \( \begin{cases} 4x - 7y = -3 \\ 2x - 3y = 1 \end{cases} \).
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