Math Problem Statement

Solve the compound inequality -2 < -5x + 5 ≤ 5 and express the solution in interval notation.

Solution

Let's analyze the inequality from the uploaded image:

The inequality is:

2<5x+55-2 < -5x + 5 \leq 5

We need to solve this compound inequality and express the solution in interval notation.


Step 1: Break the compound inequality into two parts

  1. Solve 2<5x+5-2 < -5x + 5
  2. Solve 5x+55-5x + 5 \leq 5

Step 2: Solve each part

Part 1: Solve 2<5x+5-2 < -5x + 5

  1. Subtract 5 from both sides: 25<5x-2 - 5 < -5x 7<5x-7 < -5x
  2. Divide by 5-5, remembering to reverse the inequality sign: 75>x\frac{-7}{-5} > x x<75x < \frac{7}{5}

Part 2: Solve 5x+55-5x + 5 \leq 5

  1. Subtract 5 from both sides: 5x0-5x \leq 0
  2. Divide by 5-5, remembering to reverse the inequality sign: x0x \geq 0

Step 3: Combine the solutions

From the two parts, we know: 0x<750 \leq x < \frac{7}{5}

This means xx lies in the interval [0,75)[0, \frac{7}{5}).


Final Answer:

The solution set in interval notation is: [0,75)[0, \frac{7}{5})

Would you like a detailed explanation of any step or further clarification?


Relative Questions:

  1. How do you solve compound inequalities involving "less than and equal to"?
  2. What are the rules for flipping inequality signs when dividing by a negative number?
  3. How do you convert compound inequalities into interval notation?
  4. Can we graph the solution of a compound inequality on a number line?
  5. What is the difference between closed [][ ] and open ()( ) intervals?

Tip:

Always double-check the direction of inequality signs, especially when dividing or multiplying by negative numbers.

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Math Problem Analysis

Mathematical Concepts

Algebra
Compound Inequalities
Interval Notation

Formulas

Rules for solving linear inequalities
Interval notation format

Theorems

Properties of inequalities
Reversing inequality signs when multiplying or dividing by negative numbers

Suitable Grade Level

Grades 8-10