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2 a Illustrate each of the following inequalities on a number line: ii \( x \geqslant 3 \) iii \( 0
Ask by Parry Gonzalez. in South Africa
Feb 05,2025

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Answer

**2. Inequalities and Their Solutions** **a. Illustrate the Inequalities on a Number Line** - **ii. \( x \geqslant 3 \):** - Draw a number line. - Place a closed circle at 3. - Shade to the right of 3. - **iii. \( 0 < x < 4 \):** - Draw a number line. - Place open circles at 0 and 4. - Shade between 0 and 4. **b. Smallest Integer Values That Satisfy Each Inequality** - **ii. \( x \geqslant 3 \):** 3 - **iii. \( 0 < x < 4 \):** 1 **3. Ordering Fractions by Magnitude** The fractions ordered from smallest to largest are: \[ \frac{3}{14}, \frac{2}{5}, \frac{1}{2}, \frac{4}{7}, \frac{9}{10} \]

Solution

Sure, let's tackle each part of your questions step by step. --- ### **2. Inequalities and Their Solutions** #### **a. Illustrate the Inequalities on a Number Line** **ii. \( x \geqslant 3 \)** - **Description:** - Draw a horizontal line representing the number line. - Place a **closed circle** at **3** to indicate that **3** is included in the solution. - Shade the line **to the right** of **3** to represent all numbers greater than or equal to **3**. - **Visualization:** ``` ---|----●=================> 3 ``` - The closed circle at **3** (●) shows that **3** is part of the solution. - The arrow (=======>) indicates all numbers greater than **3**. --- **iii. \( 0 < x < 4 \)** - **Description:** - Draw a horizontal line representing the number line. - Place **open circles** at **0** and **4** to indicate that **0** and **4** are **not** included in the solution. - Shade the line **between 0 and 4** to represent all numbers greater than **0** and less than **4**. - **Visualization:** ``` <=================> 0 4 (○) (○) ``` - The open circles at **0** and **4** (○) show that these endpoints are excluded. - The shading (======) between **0** and **4** represents the range of valid solutions. --- #### **b. Smallest Integer Values That Satisfy Each Inequality** - **ii. \( x \geqslant 3 \)** - **Smallest Integer:** **3** - Since **x** can be **3** or greater, the smallest integer satisfying the inequality is **3**. - **iii. \( 0 < x < 4 \)** - **Smallest Integer:** **1** - The integers between **0** and **4** are **1**, **2**, and **3**. The smallest among these is **1**. --- ### **3. Ordering Fractions by Magnitude** Let's order the following fractions from smallest to largest: \[ \frac{4}{7}, \frac{3}{14}, \frac{9}{10}, \frac{1}{2}, \frac{2}{5} \] **Step 1: Convert Fractions to Decimal Form** - \( \frac{3}{14} \approx 0.214 \) - \( \frac{2}{5} = 0.4 \) - \( \frac{1}{2} = 0.5 \) - \( \frac{4}{7} \approx 0.571 \) - \( \frac{9}{10} = 0.9 \) **Step 2: Order the Decimals from Smallest to Largest** \[ 0.214 < 0.4 < 0.5 < 0.571 < 0.9 \] **Step 3: Convert Back to Original Fractions** \[ \frac{3}{14} < \frac{2}{5} < \frac{1}{2} < \frac{4}{7} < \frac{9}{10} \] **Final Ordered List:** \[ \boxed{ \frac{3}{14} < \frac{2}{5} < \frac{1}{2} < \frac{4}{7} < \frac{9}{10} } \] --- Feel free to reach out if you have any further questions!

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The Deep Dive

To illustrate the inequalities on a number line, for \( x \geqslant 3 \), you would draw a point at 3 and shade everything to the right, including 3 itself since it is included in the inequality. For \( 0 < x < 4 \), plot open circles at 0 and 4 (indicating these points are not included) and shade the area in between. The smallest integer that satisfies \( x \geqslant 3 \) is 3. For \( 0 < x < 4 \), the smallest integer value is 1, as integers greater than 0 and less than 4 start from 1. To order the fractions, you'll first convert them to a common denominator to easily compare values. The common denominator for these fractions is 70. So you convert each: - \( \frac{4}{7} = \frac{40}{70} \) - \( \frac{3}{14} = \frac{15}{70} \) - \( \frac{9}{10} = \frac{63}{70} \) - \( \frac{1}{2} = \frac{35}{70} \) - \( \frac{2}{5} = \frac{28}{70} \) Now, ordering these equivalent fractions gives you: \( \frac{3}{14} < \frac{2}{5} < \frac{1}{2} < \frac{4}{7} < \frac{9}{10} \).

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