Solve and write interval notation for the solution set. Then graph the solution set. \[ 2 x+5 \leq-6 \text { or } 2 x+5 \geq 6 \]
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The Deep Dive
To solve the compound inequality \( 2x + 5 \leq -6 \) and \( 2x + 5 \geq 6 \), we’ll tackle each part separately. 1. For \( 2x + 5 \leq -6 \): \[ 2x \leq -6 - 5 \\ 2x \leq -11 \\ x \leq -\frac{11}{2} \\ x \leq -5.5 \] 2. For \( 2x + 5 \geq 6 \): \[ 2x \geq 6 - 5 \\ 2x \geq 1 \\ x \geq \frac{1}{2} \] Now we combine the solutions: \[ x \leq -5.5 \quad \text{or} \quad x \geq 0.5 \] In interval notation, the solution set is: \[ (-\infty, -5.5] \cup [0.5, \infty) \] Now, let's graph the solution set: - On a number line, we would shade to the left starting from -5.5 excluding any values before it (and include -5.5 with a closed dot). - We would also shade to the right starting from 0.5 including 0.5 (with a closed dot) and extending infinitely in that direction. This visually represents all the values of \( x \) that satisfy the original inequalities.
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