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27 November, 08:32

suppose y varies directly with X, and Y = 22 when x = 8 what is the value of y when x = 10

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Answers (2)
  1. 27 November, 09:29
    0
    27.5

    22 = K (8)

    Divide 8 on both sides to get your K value

    2.75 = K

    Plug your K value into the other equation

    Y = 2.75 (10)

    Solve to get Y

    Y = 27.5 When the problem asks "vary directly", it is saying that you are multiplying your K value with your X value (K*X). If the problem is asks "vary indirectly", it is saying that you are dividing your K value by your X value (K/X)
  2. 27 November, 12:10
    0
    Use K=y/x

    K=22/x

    K=22/8

    then simplify

    K=11/4
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