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Question
Use the image to answer the question.
A coordinate plane with four quadrants shows the x- and y-axes ranging from negative 5 to 5 in increments of 1. A solid line and a dotted line intersect each other. The equation of the solid line is x minus 5 y equals 3. The equation of the dotted line is 3 x minus 2 y equals negative 4. The intersection of both lines is shown at negative 2 on the x-axis and negative 1 on the y-axis in quadrant 3.
Review the graphs of a system of two linear equations in two variables: x−5y=7
and 3x−2y=−4
. Find the solution to both equations.
(1 point)
The intersection point is
Use the image to answer the question.
A coordinate plane with four quadrants shows the x- and y-axes ranging from negative 5 to 5 in increments of 1. A solid line and a dotted line intersect each other. The equation of the solid line is x minus 5 y equals 3. The equation of the dotted line is 3 x minus 2 y equals negative 4. The intersection of both lines is shown at negative 2 on the x-axis and negative 1 on the y-axis in quadrant 3.
Review the graphs of a system of two linear equations in two variables: x−5y=7
and 3x−2y=−4
. Find the solution to both equations.
(1 point)
The intersection point is
Answers
Answered by
GPT-4o mini
To find the solution to the system of equations \( x - 5y = 7 \) and \( 3x - 2y = -4 \), we need to solve these equations simultaneously.
1. **Start with the first equation:**
\[
x - 5y = 7
\]
Rearranging for \( x \):
\[
x = 5y + 7
\]
2. **Substitute \( x \) into the second equation:**
\[
3x - 2y = -4
\]
Replacing \( x \) with \( 5y + 7 \):
\[
3(5y + 7) - 2y = -4
\]
This simplifies to:
\[
15y + 21 - 2y = -4
\]
\[
13y + 21 = -4
\]
\[
13y = -4 - 21
\]
\[
13y = -25
\]
\[
y = -\frac{25}{13}
\]
3. **Substituting back to find \( x \):**
Using \( y = -\frac{25}{13} \) in \( x = 5y + 7 \):
\[
x = 5\left(-\frac{25}{13}\right) + 7
\]
\[
x = -\frac{125}{13} + 7
\]
Convert \( 7 \) into a fraction:
\[
x = -\frac{125}{13} + \frac{91}{13}
\]
\[
x = -\frac{125 - 91}{13} = -\frac{34}{13}
\]
4. **Final intersection point:**
The intersection point is given by:
\[
\left(-\frac{34}{13}, -\frac{25}{13}\right)
\]
Thus, the intersection point is **(-34/13, -25/13)**.
1. **Start with the first equation:**
\[
x - 5y = 7
\]
Rearranging for \( x \):
\[
x = 5y + 7
\]
2. **Substitute \( x \) into the second equation:**
\[
3x - 2y = -4
\]
Replacing \( x \) with \( 5y + 7 \):
\[
3(5y + 7) - 2y = -4
\]
This simplifies to:
\[
15y + 21 - 2y = -4
\]
\[
13y + 21 = -4
\]
\[
13y = -4 - 21
\]
\[
13y = -25
\]
\[
y = -\frac{25}{13}
\]
3. **Substituting back to find \( x \):**
Using \( y = -\frac{25}{13} \) in \( x = 5y + 7 \):
\[
x = 5\left(-\frac{25}{13}\right) + 7
\]
\[
x = -\frac{125}{13} + 7
\]
Convert \( 7 \) into a fraction:
\[
x = -\frac{125}{13} + \frac{91}{13}
\]
\[
x = -\frac{125 - 91}{13} = -\frac{34}{13}
\]
4. **Final intersection point:**
The intersection point is given by:
\[
\left(-\frac{34}{13}, -\frac{25}{13}\right)
\]
Thus, the intersection point is **(-34/13, -25/13)**.