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
3:24 minutes
Problem 49a
Textbook Question
Textbook QuestionSolve each equation or inequality. | 5x + 1/2 | -2 < 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 represents the distance of a number from zero on the number line, regardless of direction. For example, |x| equals x if x is positive and -x if x is negative. In the context of inequalities, understanding how to manipulate absolute values is crucial for solving equations that involve them.
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Inequalities
Inequalities express a relationship where one side is not equal to the other, using symbols like <, >, ≤, or ≥. Solving inequalities often involves isolating the variable, similar to equations, but requires careful consideration of the direction of the inequality when multiplying or dividing by negative numbers.
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Solving Linear Equations
Solving linear equations involves finding the value of the variable that makes the equation true. This process typically includes combining like terms, isolating the variable, and applying inverse operations. In the case of inequalities, the same principles apply, but the solution set may include a range of values rather than a single point.
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