Question
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2. Solve the inequality \( \frac{2}{3} y-\frac{1}{3}(1-2 y) \geq y+\left\lvert\, \frac{1}{3}\right. \) and illuatrate your anewer on a number line.

Ask by Olson Bowman. in Ghana
Jan 25,2025

Real Tutor Solution

Tutor-Verified Answer

Answer

\( y \geq 2 \) On the number line, this is represented by a closed circle at 2 and an arrow pointing to the right, indicating all values greater than or equal to 2 satisfy the inequality.

Solution

To solve the inequality: \[ \frac{2}{3} y - \frac{1}{3}(1 - 2y) \geq y + \left| \frac{1}{3} \right| \] follow these steps: ### Step 1: Simplify Both Sides 1. **Simplify the Absolute Value**: \[ \left| \frac{1}{3} \right| = \frac{1}{3} \] 2. **Expand the Left Side**: \[ \frac{2}{3} y - \frac{1}{3}(1 - 2y) = \frac{2}{3} y - \frac{1}{3} + \frac{2}{3} y = \frac{4}{3} y - \frac{1}{3} \] 3. **Write the Simplified Inequality**: \[ \frac{4}{3} y - \frac{1}{3} \geq y + \frac{1}{3} \] ### Step 2: Collect Like Terms 1. **Subtract \( y \) from Both Sides**: \[ \frac{4}{3} y - y - \frac{1}{3} \geq \frac{1}{3} \] 2. **Convert \( y \) to Thirds**: \[ \frac{4}{3} y - \frac{3}{3} y - \frac{1}{3} \geq \frac{1}{3} \] 3. **Combine Like Terms**: \[ \frac{1}{3} y - \frac{1}{3} \geq \frac{1}{3} \] 4. **Add \( \frac{1}{3} \) to Both Sides**: \[ \frac{1}{3} y \geq \frac{2}{3} \] 5. **Multiply Both Sides by 3**: \[ y \geq 2 \] ### Solution \[ y \geq 2 \] ### Number Line Illustration Below is the graph of the solution on a number line: \[ \begin{array}{c} \text{---|---|---|---|---|---|---|---} \\ \quad 1 \quad \quad 2 \quad \quad 3 \quad \end{array} \] - **Closed Circle at \( y = 2 \)**: Indicates that \( y = 2 \) is included in the solution. - **Shaded Region to the Right of 2**: Represents all values \( y \geq 2 \). \[ \begin{tikzpicture} \draw[<->] (-1,0) -- (5,0) node[right] {$y$}; \foreach \x in {0,2,4} \draw (\x,3pt) -- (\x,-3pt) node[below] {$\x$}; \draw[very thick] (2,0) circle (2pt); \draw[thick, ->] (2,0) -- (4.5,0); \end{tikzpicture} \] In this illustration: - The **closed dot** at \( y = 2 \) signifies \( y = 2 \) is part of the solution. - The **arrow** indicates that all values greater than or equal to 2 satisfy the inequality.

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Beyond the Answer

First, let's simplify the given inequality step by step. We start with: \[ \frac{2}{3} y - \frac{1}{3} (1 - 2y) \geq y + \left\lvert \frac{1}{3} \right. \] Distributing \(-\frac{1}{3}\) within the parentheses: \[ \frac{2}{3} y - \frac{1}{3} + \frac{2}{3} y \geq y + \frac{1}{3} \] Combining like terms on the left side gives: \[ \frac{4}{3} y - \frac{1}{3} \geq y + \frac{1}{3} \] Now, we will bring like terms together. Subtract \(y\) from both sides: \[ \frac{4}{3} y - y - \frac{1}{3} \geq \frac{1}{3} \] This can be rewritten as: \[ \frac{4}{3} y - \frac{3}{3} y - \frac{1}{3} \geq \frac{1}{3} \] Simplifying further yields: \[ \frac{1}{3} y - \frac{1}{3} \geq \frac{1}{3} \] Now, add \(\frac{1}{3}\) to both sides: \[ \frac{1}{3} y \geq \frac{1}{3} + \frac{1}{3} \] This simplifies to: \[ \frac{1}{3} y \geq \frac{2}{3} \] To solve for \(y\), multiply both sides by 3: \[ y \geq 2 \] Now, we can illustrate this on a number line. You would place a closed circle on the number 2 (since it is included in the solution) and shade all the numbers to the right of 2, indicating that \(y\) can be any number greater than or equal to 2. So the solution is \(y \geq 2\) with a visual representation as described.

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