To determine whether Roxanne's solution (−3, −3) is correct for the equations \( y = 23x - 5 \) and \( y = -2x + 3 \), we should first find the intersection point by setting the two equations equal to each other.
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Set the equations equal: \[ 23x - 5 = -2x + 3 \]
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Solve for \( x \): \[ 23x + 2x = 3 + 5 \] \[ 25x = 8 \] \[ x = \frac{8}{25} \]
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Now substitute \( x = \frac{8}{25} \) into one of the original equations to find \( y \). We'll use \( y = -2x + 3 \): \[ y = -2\left(\frac{8}{25}\right) + 3 \] \[ y = -\frac{16}{25} + 3 \] \[ y = -\frac{16}{25} + \frac{75}{25} \] \[ y = \frac{59}{25} \]
So the intersection point, i.e., the solution to the system of equations, is \(\left(\frac{8}{25}, \frac{59}{25}\right)\) or approximately (0.32, 2.36).
Since Roxanne's solution of (−3, −3) is incorrect, the correct explanation is: No, she switched the x and y values of the intersection point when writing the solution.