Math Problem Statement

Solve |2x + 5| < 11 and graph the solutions.

Solution

The problem asks to solve the inequality 2x+5<11|2x + 5| < 11 and graph the solutions.

Step 1: Solve the inequality

The absolute value inequality 2x+5<11|2x + 5| < 11 can be written as two separate inequalities:

  1. 2x+5<112x + 5 < 11
  2. 2x+5>112x + 5 > -11

Step 2: Solve both inequalities

  • For 2x+5<112x + 5 < 11: 2x<6(subtract 5 from both sides)2x < 6 \quad \text{(subtract 5 from both sides)} x<3(divide both sides by 2)x < 3 \quad \text{(divide both sides by 2)}

  • For 2x+5>112x + 5 > -11: 2x>16(subtract 5 from both sides)2x > -16 \quad \text{(subtract 5 from both sides)} x>8(divide both sides by 2)x > -8 \quad \text{(divide both sides by 2)}

Step 3: Combine the results

The solution to the inequality is the combination of both: 8<x<3-8 < x < 3

Step 4: Graph the solution

The solution 8<x<3-8 < x < 3 is shown as a line segment on the number line, excluding the points 8-8 and 33.

Step 5: Select the correct graph

The correct graph will show the open interval between 8-8 and 33, which corresponds to the first option:
8<x<3-8 < x < 3.

Would you like more details on this process or any further clarifications? Here are some related questions you may find helpful:

  1. What is the difference between an open and closed interval on a number line?
  2. How do you solve inequalities involving absolute value?
  3. What is the meaning of "and" vs. "or" in compound inequalities?
  4. How would the solution change if the inequality were 2x+511|2x + 5| \leq 11?
  5. Can you graph inequalities with absolute values that involve "greater than" instead of "less than"?

Tip: Always break absolute value inequalities into two cases—one for the positive expression and one for the negative—then solve each part separately.

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Math Problem Analysis

Mathematical Concepts

Absolute Value Inequalities
Compound Inequalities
Number Line Graphing

Formulas

|A| < B implies -B < A < B

Theorems

Properties of Absolute Value Inequalities

Suitable Grade Level

Grades 9-11