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
1. Equations & Inequalities
Linear Inequalities
4:07 minutes
Problem 77a
Textbook Question
Textbook QuestionIn Exercises 59–94, solve each absolute value inequality. |3 - (2/3)x| > 5
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Key Concepts
Here are the essential concepts you must grasp in order to answer the question correctly.
Absolute Value
Absolute value measures the distance of a number from zero on the number line, regardless of direction. For any real number x, the absolute value is denoted as |x| and is defined as |x| = x if x ≥ 0, and |x| = -x if x < 0. Understanding absolute value is crucial for solving inequalities that involve expressions within absolute value bars.
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Inequalities
Inequalities express a relationship between two expressions that are not necessarily equal. They can be strict (using < or >) or non-strict (using ≤ or ≥). When solving absolute value inequalities, it is important to consider the two cases that arise from the definition of absolute value, leading to two separate inequalities to solve.
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Solving Linear Inequalities
Solving linear inequalities involves finding the values of the variable that satisfy the inequality. This process often includes isolating the variable on one side of the inequality sign. When dealing with absolute value inequalities, after breaking them into two cases, one must solve each resulting linear inequality and then combine the solutions to find the overall solution set.
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