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12 January, 12:58

Are the below pairs of lines parallel, perpendicular, or neither?

9x+12y = 8 and 6x+8y = - 1

Parallel

Perpendicular

Neither

+4
Answers (2)
  1. 12 January, 14:18
    0
    9x + 12y = 8

    12y = - 9x + 8

    y = - 3/4x + 2/3 ... slope here is - 3/4, y int is 2/3

    6x + 8y = - 1

    8y = - 6x - 1

    y = - 3/4x - 1/8 ... slope here is - 3/4, y int is - 1/8

    same slope, different y intercepts means parallel lines
  2. 12 January, 15:33
    0
    They are parallel to eachother
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