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OpenStudy (anonymous):
Tell whether the lines for each pair of equations are parallel, perpendicular, or neither: y = -2x + 4 and -5x + 10y = 5
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OpenStudy (henryblah):
Try rearranging the 2nd equation to the same form as the 1st one.
OpenStudy (anonymous):
I get y= 1/2x + 5
OpenStudy (henryblah):
Ok, so what are the 2 gradients?
OpenStudy (henryblah):
If they are the same, they are parallel. Product equal to -1 they are perpendicular.
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