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OpenStudy (anonymous):
9x-2y=3 and 2x+9y=3 parallel,perpendicular, or neither
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OpenStudy (anonymous):
Perpendicular lines have slopes that are negative reciprocals. Parallel lines have slopes that are the same.
OpenStudy (anonymous):
to expand on brittni's response, if you solve the equations for y, the slope is the coefficient in front of the x term. then use brittni's help.
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