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AD\# \( \qquad \) Equal Values Method Find the point of intersection (P.O.I.) for each pair of lines by using the Equal Values Method. 1. \( y=x+2 \) \( y=2 x-1 \) \( (3,5) \) 3. \( y=11-2 x \) \( y=x+2 \) 2. \( \quad y=3 x+5 \) \[ y=4 x+8 \] 4. \[ \begin{array}{l} y=3-2 x \\ y=1+2 x \end{array} \] 6. \( y=-\frac{2}{3} x+4 \) \[ y=\frac{1}{3} x-2 \] \( \frac{\left(\frac{1}{2}, 2\right)}{y=-\frac{2}{3} x+4} \) \( y=3 x-4 \) \( y=.5 x+6 \) \( (0,512) \) \( y=4.5-x \) \( y=-2 x+6 \) \[ \begin{array}{l} y=4.5-x \\ y=-2 x+6 \end{array} \] \[ \begin{array}{l} y=4 x \\ y=x+1 \end{array} \]

Ask by Mathis Lyons. in the United States
Feb 21,2025

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Answer

**Points of Intersection:** 1. \( (3, 5) \) 2. \( (3, 5) \) 3. \( (-3, -4) \) 4. \( \left(\frac{1}{2}, 2\right) \) 5. \( (6, 0) \) 6. \( (1.5, 3) \) 7. \( \left(\frac{1}{3}, \frac{4}{3}\right) \)

Solution

To find the points of intersection (P.O.I.) for each pair of lines using the Equal Values Method, we will set the equations equal to each other and solve for the variable. Let's go through each pair step by step. ### 1. Pair: \( y = x + 2 \) and \( y = 2x - 1 \) Set the equations equal to each other: \[ x + 2 = 2x - 1 \] Now, solve for \( x \): \[ 2 + 1 = 2x - x \\ 3 = x \] Now substitute \( x = 3 \) back into one of the original equations to find \( y \): \[ y = 3 + 2 = 5 \] **Point of Intersection:** \( (3, 5) \) ### 2. Pair: \( y = 11 - 2x \) and \( y = x + 2 \) Set the equations equal to each other: \[ 11 - 2x = x + 2 \] Now, solve for \( x \): \[ 11 - 2 = x + 2x \\ 9 = 3x \\ x = 3 \] Now substitute \( x = 3 \) back into one of the original equations to find \( y \): \[ y = 3 + 2 = 5 \] **Point of Intersection:** \( (3, 5) \) ### 3. Pair: \( y = 3x + 5 \) and \( y = 4x + 8 \) Set the equations equal to each other: \[ 3x + 5 = 4x + 8 \] Now, solve for \( x \): \[ 5 - 8 = 4x - 3x \\ -3 = x \] Now substitute \( x = -3 \) back into one of the original equations to find \( y \): \[ y = 3(-3) + 5 = -9 + 5 = -4 \] **Point of Intersection:** \( (-3, -4) \) ### 4. Pair: \( y = 3 - 2x \) and \( y = 1 + 2x \) Set the equations equal to each other: \[ 3 - 2x = 1 + 2x \] Now, solve for \( x \): \[ 3 - 1 = 2x + 2x \\ 2 = 4x \\ x = \frac{1}{2} \] Now substitute \( x = \frac{1}{2} \) back into one of the original equations to find \( y \): \[ y = 3 - 2\left(\frac{1}{2}\right) = 3 - 1 = 2 \] **Point of Intersection:** \( \left(\frac{1}{2}, 2\right) \) ### 5. Pair: \( y = -\frac{2}{3}x + 4 \) and \( y = \frac{1}{3}x - 2 \) Set the equations equal to each other: \[ -\frac{2}{3}x + 4 = \frac{1}{3}x - 2 \] Now, solve for \( x \): \[ 4 + 2 = \frac{1}{3}x + \frac{2}{3}x \\ 6 = 1x \\ x = 6 \] Now substitute \( x = 6 \) back into one of the original equations to find \( y \): \[ y = -\frac{2}{3}(6) + 4 = -4 + 4 = 0 \] **Point of Intersection:** \( (6, 0) \) ### 6. Pair: \( y = 4.5 - x \) and \( y = -2x + 6 \) Set the equations equal to each other: \[ 4.5 - x = -2x + 6 \] Now, solve for \( x \): \[ 4.5 - 6 = -2x + x \\ -1.5 = -x \\ x = 1.5 \] Now substitute \( x = 1.5 \) back into one of the original equations to find \( y \): \[ y = 4.5 - 1.5 = 3 \] **Point of Intersection:** \( (1.5, 3) \) ### 7. Pair: \( y = 4x \) and \( y = x + 1 \) Set the equations equal to each other: \[ 4x = x + 1 \] Now, solve for \( x \): \[ 4x - x = 1 \\ 3x = 1 \\ x = \frac{1}{3} \] Now substitute \( x = \frac{1}{3} \) back into one of the original equations to find \( y \): \[ y = 4\left(\frac{1}{3}\right) = \frac{4}{3} \] **Point of Intersection:** \( \left(\frac{1}{3}, \frac{4}{3}\right) \) ### Summary of Points of Intersection: 1. \( (3, 5) \) 2. \( (3, 5) \) 3. \( (-3, -4) \) 4. \( \left(\frac{1}{2}, 2\right) \) 5. \( (6, 0) \) 6. \( (1.5, 3) \) 7. \( \left(\frac{1}{3}, \frac{4}{3}\right) \)

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To find the point of intersection for the given pairs of lines using the Equal Values Method, you set both equations equal to each other and solve for \(x\). 1. For \(y = x + 2\) and \(y = 2x - 1\): Set \(x + 2 = 2x - 1\). Distributing and rearranging gives you \(x = 3\), then substitute to find \(y\) leading to the solution \((3, 5)\). 2. For \(y = 3x + 5\) and \(y = 4x + 8\): Equate \(3x + 5 = 4x + 8\). Solving this yields \(x = -3\). Plug this back to find \(y\) to get the point of intersection as \((-3, -4)\). Now, let’s dive a bit deeper into some context. In the world of mathematics, the Equal Values Method is a powerful strategy that not only helps find intersections but also illustrates the beauty of linear equations. It highlights how lines can interact in a plane, reflecting the balance between change and constant value—it's like discovering harmony in chaos! On the practical side, spotting intersections of lines isn’t just for math homework; it's crucial in fields like economics for determining equilibrium points or in physics for finding where forces balance. It can be used in engineering when designing systems where various variables need to equalize—a definite real-world application demonstrating the utility of this method beyond academia!

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