In Exercises 59–94, solve each absolute value inequality. |x| > 3
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- 0. Review of Algebra4h 18m
- 1. Equations & Inequalities3h 18m
- 2. Graphs of Equations1h 43m
- 3. Functions2h 17m
- 4. Polynomial Functions1h 44m
- 5. Rational Functions1h 23m
- 6. Exponential & Logarithmic Functions2h 28m
- 7. Systems of Equations & Matrices4h 5m
- 8. Conic Sections2h 23m
- 9. Sequences, Series, & Induction1h 22m
- 10. Combinatorics & Probability1h 45m
1. Equations & Inequalities
Linear Inequalities
Problem 74
Textbook Question
Write each statement using an absolute value equation or inequality.
q is no more than 8 units from 22.
Verified step by step guidance1
Identify the key phrase "no more than 8 units from 22," which means the distance between q and 22 is at most 8.
Recall that the absolute value expression \(\left| q - a \right|\) represents the distance between q and a on the number line.
Translate the phrase into the inequality \(\left| q - 22 \right| \leq 8\), where the absolute value measures the distance from 22.
Understand that the inequality \(\left| q - 22 \right| \leq 8\) means q is within 8 units either less than or greater than 22.
This absolute value inequality correctly represents the statement "q is no more than 8 units from 22."
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Key Concepts
Here are the essential concepts you must grasp in order to answer the question correctly.
Absolute Value Definition
The absolute value of a number represents its distance from zero on the number line, always as a non-negative value. For any number x, |x| denotes this distance, so |x| ≥ 0. This concept helps express distances regardless of direction.
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Translating Distance Statements into Absolute Value
When a variable is described as being within a certain distance from a number, it can be expressed as an absolute value inequality. For example, 'q is no more than 8 units from 22' translates to |q - 22| ≤ 8, representing all values q within 8 units of 22.
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Formulating Absolute Value Inequalities
Absolute value inequalities like |x - a| ≤ b describe all values x within a distance b from a fixed point a. This inequality can be rewritten as a compound inequality a - b ≤ x ≤ a + b, which helps in solving or graphing the solution set.
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