Math Problem Statement

Graph on a number line: -|x|-3 is greater than -7; D={Integers}

Solution

Let's break down the inequality step by step:

Given inequality:
x3>7-|x| - 3 > -7

Step 1: Isolate the absolute value term

Add 3 to both sides of the inequality:

x>7+3-|x| > -7 + 3 x>4-|x| > -4

Step 2: Multiply both sides by -1

When multiplying or dividing by a negative number, the inequality sign flips:

x<4|x| < 4

Step 3: Solve the inequality for xx

The inequality x<4|x| < 4 means that the distance of xx from 0 is less than 4. So, the solution is:

4<x<4-4 < x < 4

Step 4: Consider the domain D={Integers}D = \{\text{Integers}\}

Since the problem specifies that the domain is the set of integers, we need to find all integer values of xx that satisfy this inequality.

The integers that lie between -4 and 4 (not including -4 and 4 themselves) are: x=3,2,1,0,1,2,3x = -3, -2, -1, 0, 1, 2, 3

Step 5: Graph on a number line

You will plot these values as open circles at x=3,2,1,0,1,2,3x = -3, -2, -1, 0, 1, 2, 3, since the inequality is strict (<<, not \leq).


Let me know if you would like me to graph it for you or if you'd like further clarification!

Here are 5 questions to expand on this topic:

  1. What happens if the inequality is x37-|x| - 3 \geq -7?
  2. How would the solution change if the domain were real numbers instead of integers?
  3. Can we graph absolute value inequalities on a number line even if the domain is continuous?
  4. How do we solve inequalities involving absolute value with a negative right-hand side?
  5. What does it mean geometrically to solve absolute value inequalities?

Tip: Always remember to flip the inequality sign when multiplying or dividing by a negative number!

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Math Problem Analysis

Mathematical Concepts

Inequalities
Absolute Value
Algebra
Graphing on a number line

Formulas

-|x| - 3 > -7
|x| < 4

Theorems

Solving absolute value inequalities
Multiplying/dividing by negative numbers flips the inequality sign

Suitable Grade Level

Grades 7-9