Find the value of k so that the line passing through the points (k, -1) and (-2, 8) is parallel to the equation 3x + y = –

Question

Find the value of k so that the
line passing through the points
(k, -1) and (-2, 8) is parallel to
the equation 3x + y = -7.

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Latifah 5 years 2021-08-09T15:47:54+00:00 1 Answers 239 views 1

Answers ( )

  1. RobertKer
    0
    2021-08-09T15:49:42+00:00
    Reply

    Answer:

    gradient = - 3 \\ - 3 = \frac{(8 + 1)}{( - 2 - k)} \\ 3(2 + k) = 9 \\ 2 + k = 3 \\ k = 1

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Giải phương trình 1 ẩn: x + 2 - 2(x + 1) = -x . Hỏi x = ? ( )