Math Problem Statement

Solve each inequality - graph the solution and give interval notation.

Solution

Let's solve the inequalities shown in the image.

1. Inequality: 9x999|x| - 9 \leq 9

  • First, isolate the absolute value term: 9x999|x| - 9 \leq 9 Add 9 to both sides: 9x189|x| \leq 18 Divide by 9: x2|x| \leq 2 This implies: 2x2-2 \leq x \leq 2 The solution is the interval: [2,2][-2, 2]

2. Inequality: 5x325|x| - 3 \geq 2

  • Isolate the absolute value term: 5x325|x| - 3 \geq 2 Add 3 to both sides: 5x55|x| \geq 5 Divide by 5: x1|x| \geq 1 This implies two cases: x1orx1x \geq 1 \quad \text{or} \quad x \leq -1 So, the solution is: (,1][1,)(-\infty, -1] \cup [1, \infty)

Interval Notation Summary:

  1. For 9x999|x| - 9 \leq 9, the interval notation is [2,2][-2, 2].
  2. For 5x325|x| - 3 \geq 2, the interval notation is (,1][1,](-\infty, -1] \cup [1, \infty].

Let me know if you have any questions or need further clarification!

Here are 5 related questions for further exploration:

  1. How do you solve compound inequalities involving absolute values?
  2. What is the difference between strict inequalities (<<, >>) and non-strict inequalities (\leq, \geq)?
  3. How do we interpret absolute value inequalities geometrically?
  4. Can absolute value inequalities have no solution?
  5. How do you solve absolute value equations?

Tip: When solving absolute value inequalities, always remember to split the inequality into two cases based on the definition of absolute value.

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Math Problem Analysis

Mathematical Concepts

Algebra
Absolute Value Inequalities

Formulas

Absolute value inequality: |x|
Basic algebraic manipulation: isolating absolute value terms
Interval notation for solutions

Theorems

Properties of absolute values
Solving absolute value inequalities by splitting into two cases

Suitable Grade Level

Grades 8-10