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OpenStudy (anonymous):
Which pair of equations below represent perpendicular lines? A) y = 7/8x + 12 and y = -8/7x - 8 B) y = 5x + 15 and y = -5x + 15 C) y = 4x + 9 and y = 4x - 9 D) y = 9 and y = 18
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OpenStudy (anonymous):
perpendicular lines' slope are negative reciprocals so the answer is A
OpenStudy (anonymous):
Thanks! :D
OpenStudy (anonymous):
:)
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