Math Problem Statement

Solve the compound inequality: x ≤ -1 or x ≥ 2. Select the correct choice and graph the solution on a number line.

Solution

The compound inequality in the image is:

x1orx2x \leq -1 \quad \text{or} \quad x \geq 2

This inequality can be solved as follows:

  • First part: x1x \leq -1
  • Second part: x2x \geq 2

This is an "or" inequality, meaning that xx can satisfy either one or both conditions. Therefore, the solution is the union of these two intervals.

Solution set:

  • The solution consists of all values of xx that are less than or equal to 1-1, and all values of xx that are greater than or equal to 22.

This can be written in interval notation as:

(,1][2,)(-\infty, -1] \cup [2, \infty)

Now, let's analyze the answer choices based on this understanding:

  • Choice A is incorrect because the inequality symbols or the number ranges seem to be wrong.

  • Choice B correctly matches the inequality. It will likely say:

    {xx1orx2}\{ x \mid x \leq -1 \quad \text{or} \quad x \geq 2 \}

  • Choice C ("The solution is all real numbers") is incorrect because the solution set does not cover all real numbers.

  • Choice D ("There is no solution") is also incorrect, since there are solutions for x1x \leq -1 or x2x \geq 2.

Final Answer:

Choice B is the correct answer.

Let me know if you'd like further details or explanations!


Here are 5 related questions to deepen your understanding:

  1. How do you solve compound inequalities with "and" versus "or" conditions?
  2. Can a compound inequality ever have no solution?
  3. What is the difference between an inequality with "or" and one with "and"?
  4. How can you graph the solution of a compound inequality on a number line?
  5. How would you solve a compound inequality that involves absolute values?

Tip: When dealing with "or" inequalities, think of the union of two separate solution sets—any solution that satisfies one or both parts works!

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Math Problem Analysis

Mathematical Concepts

Algebra
Compound Inequalities
Graphing Solutions

Formulas

-

Theorems

Union of Sets (for 'or' inequalities)

Suitable Grade Level

Grades 7-9