College

Solve for [tex]x[/tex] and graph the solution on the number line below.

[tex]-13 \leq -x - 7 \text{ or } -16 \geq -x - 7[/tex]

Inequality Notation: [tex]\square[/tex]

Number Line:

Answer :

Sure, let's solve the problem step-by-step and understand what the solution means.

We have two inequalities to solve:

1. [tex]\(-13 \leq -x - 7\)[/tex]
2. [tex]\(-16 \geq -x - 7\)[/tex]

Solving the first inequality:

[tex]\[ -13 \leq -x - 7 \][/tex]

- Add 7 to both sides to isolate the term with [tex]\(x\)[/tex]:

[tex]\[ -13 + 7 \leq -x \][/tex]

Simplifying this,

[tex]\[ -6 \leq -x \][/tex]

- Next, multiply both sides by -1 to solve for [tex]\(x\)[/tex], remembering that multiplying or dividing by a negative number flips the inequality sign:

[tex]\[ 6 \geq x \][/tex]

Or, equivalently,

[tex]\[ x \leq 6 \][/tex]

Solving the second inequality:

[tex]\[ -16 \geq -x - 7 \][/tex]

- Add 7 to both sides:

[tex]\[ -16 + 7 \geq -x \][/tex]

Simplifying,

[tex]\[ -9 \geq -x \][/tex]

- Again, multiply both sides by -1 (flip the inequality sign):

[tex]\[ 9 \leq x \][/tex]

Or, equivalently,

[tex]\[ x \geq 9 \][/tex]

Combining the solutions:

Now, we combine our results from both inequalities. We're looking at:

- [tex]\(x \leq 6\)[/tex]
- [tex]\(x \geq 9\)[/tex]

In inequality notation, this union of sets is expressed as:

[tex]\[ x \leq 6 \quad \text{or} \quad x \geq 9 \][/tex]

Graphing the solution on the number line:

1. Draw a number line.
2. Place a closed circle at 6 and shade to the left, indicating all numbers less than or equal to 6.
3. Place another closed circle at 9 and shade to the right, indicating all numbers greater than or equal to 9.

This graph represents the solution to the inequalities. The solution interval shows where the conditions for [tex]\(x\)[/tex] hold true.

If you have any further questions or need more clarification, feel free to ask!