In Exercises 1–14, express each interval in set-builder notation and graph the interval on a number line. (- ∞, 3)
Table of contents
- 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 17
Textbook Question
Solve each inequality. Give the solution set in interval notation. 3(x+5)+1≥5+3x
Verified step by step guidance1
Start by expanding the left side of the inequality: \$3(x+5) + 1 \geq 5 + 3x\(. Distribute the 3 to both \)x\( and 5, which gives \)3x + 15 + 1 \geq 5 + 3x$.
Combine like terms on the left side: \$3x + 16 \geq 5 + 3x$.
Next, subtract \$3x\( from both sides to isolate the constants: \)3x + 16 - 3x \geq 5 + 3x - 3x\(, which simplifies to \)16 \geq 5$.
Analyze the resulting inequality \$16 \geq 5\(. Since this is always true, it means the original inequality holds for all values of \)x$.
Therefore, express the solution set in interval notation as all real numbers: \((-\infty, \infty)\).
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Key Concepts
Here are the essential concepts you must grasp in order to answer the question correctly.
Solving Linear Inequalities
Solving linear inequalities involves isolating the variable on one side to find the range of values that satisfy the inequality. Similar to equations, operations like addition, subtraction, multiplication, and division are used, but special care is needed when multiplying or dividing by negative numbers, as this reverses the inequality sign.
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Distributive Property
The distributive property allows you to multiply a single term across terms inside parentheses, such as a(b + c) = ab + ac. This is essential for simplifying expressions before solving inequalities, ensuring all terms are combined correctly for easier manipulation.
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Multiply Polynomials Using the Distributive Property
Interval Notation
Interval notation is a concise way to represent solution sets of inequalities using intervals. It uses parentheses for values not included (open intervals) and brackets for values included (closed intervals), clearly showing the range of solutions on the number line.
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