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16 July, 03:12

Find the value of rin (4, r), (r, 2) so that the slope of the line containing them is - 5/3

a) 7

b) - 1/7

c) - 7

d) 1/7

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Answers (1)
  1. 16 July, 04:35
    0
    a) 7

    Step-by-step explanation:

    slope = difference of y / difference of x

    -5/3 = (2 - r) / (r - 4)

    3 x (2 - r) = (-5) x (r - 4)

    6 - 3r = - 5r + 20

    -3r + 5r = 20 - 6

    2r = 14

    r = 7
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