IDNLearn.com is the perfect place to get detailed and accurate answers to your questions. Get prompt and accurate answers to your questions from our community of knowledgeable experts.

Solve the inequality below. Then, select the correct interval notation to represent the inequality.

[tex]\[ 4(x+2)\ \textless \ -\frac{1}{2}(4x-4) \][/tex]

A. [tex]\((- \infty, -1]\)[/tex]

B. [tex]\((- \infty, 4)\)[/tex]

C. [tex]\((- \infty, 4]\)[/tex]

D. [tex]\((- \infty, -1)\)[/tex]


Sagot :

To solve the given inequality [tex]\(4(x + 2) < -\frac{1}{2}(4x - 4)\)[/tex], we will follow a step-by-step approach:

### Step 1: Distribute the constants on both sides of the inequality

First, distribute the 4 on the left-hand side of the inequality:
[tex]\[ 4(x + 2) = 4x + 8 \][/tex]

Next, distribute [tex]\(-\frac{1}{2}\)[/tex] on the right-hand side of the inequality:
[tex]\[ -\frac{1}{2}(4x - 4) = -2x + 2 \][/tex]

This rewrites the inequality as:
[tex]\[ 4x + 8 < -2x + 2 \][/tex]

### Step 2: Combine like terms by adding [tex]\(2x\)[/tex] to both sides of the inequality

To get all [tex]\(x\)[/tex]-terms on one side, add [tex]\(2x\)[/tex] to both sides:
[tex]\[ 4x + 8 + 2x < -2x + 2 + 2x \][/tex]
[tex]\[ 6x + 8 < 2 \][/tex]

### Step 3: Isolate [tex]\(x\)[/tex] by subtracting 8 from both sides of the inequality

Subtract 8 from both sides to isolate the term involving [tex]\(x\)[/tex]:
[tex]\[ 6x + 8 - 8 < 2 - 8 \][/tex]
[tex]\[ 6x < -6 \][/tex]

### Step 4: Solve for [tex]\(x\)[/tex] by dividing both sides by 6

Divide both sides by 6:
[tex]\[ x < \frac{-6}{6} \][/tex]
[tex]\[ x < -1 \][/tex]

### Step 5: Write the solution in interval notation and select the correct interval

The solution to the inequality is [tex]\(x < -1\)[/tex], which is represented in interval notation as:
[tex]\[ (-\infty, -1) \][/tex]

Therefore, the correct interval notation to represent the solution to the given inequality is:
[tex]\[ (-\infty, -1) \][/tex]

### Conclusion

The correct interval notation from the given options is:
[tex]\[ (-\infty, -1) \][/tex]