20. The H.M. between 2 and 8 is (1 marks )​

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20. The H.M. between 2 and 8 is
(1 marks )​

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Nick 3 months 2021-09-02T15:03:08+00:00 1 Answers 0 views 0

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    2021-09-02T15:04:46+00:00

    Answer as an improper fraction = 16/5

    Answer as a mixed number = 3 & 1/5

    Answer in decimal form = 3.2

    All of those values represent the same thing, but written in a different way.

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    Explanation:

    I’m assuming HM stands for Harmonic Mean in this case.

    If so, then we apply the reciprocal operation to each value to get 1/2 and 1/8 (from 2 and 8 respectively).

    Add up those fractions:

    1/2 + 1/8 = 4/8 + 1/8 = 5/8

    Now we’ll divide n = 2 over that result. The n = 2 refers to the number of items in the original set.

    n divide over (5/8) = 2*(8/5) = 16/5 which is the answer as an improper fraction

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    To convert to a mixed number, we can do the following:

    16/5 = (15+1)/5

    16/5 = 15/5 + 1/5

    16/5 = 3 + 1/5

    16/5 = 3 & 1/5

    Or if you need the answer in decimal form, then using a calculator would get you 16/5 = 3.2

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