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22-06-2017
Mathematics

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10. Which pair of equations below represent perpendicular lines?
A) Y = 7/8x + 12and y = -8/7 x – 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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22-06-2017

option A has equations whose slopes are inverse of each other...so it's option A..

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