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6 August, 19:05

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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Answers (1)
  1. 6 August, 22:39
    0
    Option A has equations whose slopes are inverse of each other ... so it's option A ...
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