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Solve for inequality and represent it on the number line: \( -9<3 x-3 \leq 27 \) pyright reserved

Ask by Love King. in South Africa
Mar 15,2025

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The solution to the inequality \(-9 < 3x - 3 \leq 27\) is \(-2 < x \leq 10\). On the number line, this is represented by an open circle at \(-2\) and a closed circle at \(10\), with the line shaded between them.

Solución

1. Start with the inequality: \[ -9 < 3x - 3 \leq 27 \] 2. Add \(3\) to all parts of the inequality: \[ -9 + 3 < 3x - 3 + 3 \leq 27 + 3 \] Simplifying, we get: \[ -6 < 3x \leq 30 \] 3. Divide every part by \(3\) (since \(3\) is positive, the inequality signs remain unchanged): \[ \frac{-6}{3} < \frac{3x}{3} \leq \frac{30}{3} \] Simplifying, we obtain: \[ -2 < x \leq 10 \] 4. The solution set is: \[ x \in (-2, 10] \] 5. Number Line Representation: - Draw a horizontal line. - Place an open circle at \(-2\) (since \(-2\) is not included). - Place a closed circle at \(10\) (since \(10\) is included). - Shade the region between \(-2\) and \(10\). The number line is represented as follows: \[ \text{---(----○====●----)} \] Here, the open circle at \(-2\) signifies \(x > -2\) and the closed circle at \(10\) signifies \(x \leq 10\).

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Beyond the Answer

To solve the compound inequality \(-9 < 3x - 3 \leq 27\), we can break it into two parts. First, solve \(-9 < 3x - 3\): Add 3 to both sides: \(-6 < 3x\) Divide by 3: \(-2 < x\) or \(x > -2\). Next, solve \(3x - 3 \leq 27\): Add 3 to both sides: \(3x \leq 30\) Divide by 3: \(x \leq 10\). Combining these results gives us: \(-2 < x \leq 10\). On the number line, it would be represented with an open circle at -2, a solid circle at 10, and a line connecting the two to indicate all numbers in this range. --- To visualize this on a number line, you would draw a horizontal line representing all possible values. Then, place an open circle at -2 (indicating it’s not included) and a closed circle at 10 (indicating it is included). Shade the line between -2 and 10 to show all values that satisfy the inequality. This is a great way to visually communicate the solution to others!

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