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9 September, 16:49

When are two distinct nonvertical lines parallel?

a)

when the slopes are equal

b)

when the slopes are positive

c)

when the product of the slopes is - 1

d)

when the slopes are opposite

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Answers (1)
  1. 9 September, 17:03
    0
    a) when the slopes are equal

    Step-by-step explanation:

    The slopes of lines can be used to define the nature of lines.

    Two parallel lines have equal slopes and the product of slopes of perpendicular lines is - 1.

    Hence, we can conclude that two distinct non-vertical lines parallel when

    a) when the slopes are equal ...

    So, option a is correct ...
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