Table of contents
- 0. Fundamental Concepts of Algebra3h 29m
- 1. Equations and Inequalities3h 27m
- 2. Graphs1h 43m
- 3. Functions & Graphs2h 17m
- 4. Polynomial Functions1h 54m
- 5. Rational Functions1h 23m
- 6. Exponential and Logarithmic Functions2h 28m
- 7. Measuring Angles40m
- 8. Trigonometric Functions on Right Triangles2h 5m
- 9. Unit Circle1h 19m
- 10. Graphing Trigonometric Functions1h 19m
- 11. Inverse Trigonometric Functions and Basic Trig Equations1h 41m
- 12. Trigonometric Identities 2h 34m
- 13. Non-Right Triangles1h 38m
- 14. Vectors2h 25m
- 15. Polar Equations2h 5m
- 16. Parametric Equations1h 6m
- 17. Graphing Complex Numbers1h 7m
- 18. Systems of Equations and Matrices3h 6m
- 19. Conic Sections2h 36m
- 20. Sequences, Series & Induction1h 15m
- 21. Combinatorics and Probability1h 45m
- 22. Limits & Continuity1h 49m
- 23. Intro to Derivatives & Area Under the Curve2h 9m
18. Systems of Equations and Matrices
Two Variable Systems of Linear Equations
Struggling with Precalculus?
Join thousands of students who trust us to help them ace their exams!Watch the first videoMultiple Choice
Solve the following system of equations. Classify it as CONSISTENT (INDEPENDENT or DEPENDENT) or INCONSISTENT.
2x+8y=7
x+4y=19
A
Consistent and Independent
B
Consistent and Dependent
C
Inconsistent

1
Step 1: Write down the given system of equations. The first equation is 2x + 8y = 7, and the second equation is x + 4y = 19.
Step 2: Simplify the first equation by dividing all terms by 2 to make it easier to compare with the second equation. This gives x + 4y = 3.5.
Step 3: Compare the simplified first equation (x + 4y = 3.5) with the second equation (x + 4y = 19).
Step 4: Notice that the left-hand sides of both equations are identical, but the right-hand sides are different (3.5 ≠ 19).
Step 5: Conclude that the system of equations is inconsistent because the equations represent parallel lines that never intersect, meaning there is no solution.
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