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3 January, 06:17

9. 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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  1. 3 January, 06:27
    0
    A is correct ...
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