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by stephzgurl on June 21st, 2008

stephzgurl

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Help answer this question below.

(2^-1 + 3^-1)/(4^-1 + 8^-1) =

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Answers. 7 helpful answers below.

  • by needtoknow on June 21st, 2008

    needtoknow

    93

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  • by bright spark. on June 23rd, 2008

    bright spark.

    Sorry i cannot read your question clearly as i need stronger lenses can you help make it bigger please then i will answer the question thanks Sorry but my eye sight is really bad.

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  • by jim94087 on June 23rd, 2008

    jim94087

    20/9 = 2.222...


    http://www.google.com/search?hl=en&q=+%282%5E-1+%2B+3%5E-1%29%2F%284%5E-1+%2B+8%5E-1%29+%3D&btnG=Google+Search

    5/6 / (3/8) = 40 / 18 = 20 / 9

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  • by GarikZ on June 22nd, 2008

    GarikZ

    First parenthesis: 1/2+1/3=3/6+2/6=5/6

    Second parenthesis: 1/4+1/8=2/8+1/8=3/8

    (5/6)/(3/8)=(5/6)*(8/3)=(5*8)/(6*3)=<cancel 2>(5*4)/(3*3)=20/9=2 and 2/9

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  • by Takei-Shihan on June 21st, 2008

    Takei-Shihan

    ... try picking "B" ... on your multiple choice test, see if you get it right ...

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  • by Imnottellingyou on June 23rd, 2008

    Imnottellingyou

    go to calculator.com and type it in i got 1.3888888888888888 which is 1 and 7/18 so that would be 25/18 but i could have put it in wrong

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  • by The Special One on June 23rd, 2008

    The Special One

    X^-1 is the same as 1/x. So, just re-write your equation to something that you can understand a little bit better.

    [(1/2) + (1/3)] / [(1/4) + (1/8)]
    The easiest thing to do next is the simplify the numerator and denominator.
    Numerator:= 3/6 + 2/6, or 5/6
    Denominator: = 2/8 + 1/8, or 3/8

    So now you're left with (5/6) / ( 3/8)
    And you know that when you divide by a fraction, you can just invert it and multiply.
    So it simplifies to (5/6)*(8/3), which is 40/18 or 20/9

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