help on math plz!!!

Discussion in 'General Discussions' started by kolby998, Nov 8, 2007.

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  1. kolby998

    kolby998 Level I

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    ok i was doing my math homework then i come arcorss a problem i had this problem:

    1.2/x= 9/3

    how do u solve this and wats the ansewer?

    thx
     
    #1 kolby998, Nov 8, 2007
  2. MCheezie

    MCheezie Level IV

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    I'm pretty sure you would cross multiply. That being 1.2 times 3 and x times 9.

    1.2/x = 9/3

    3.6=9x

    then divide by 9/

    3.6/9=0.4

    so

    x=0.4

    I'm pretty sure that's how it would work, haven't done that in ages. Trig is totally different than Algebra.
     
    #2 MCheezie, Nov 8, 2007
  3. Commy

    Commy Moderator
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    Yeah, Magnetic Cheese is right.
    But to make it easier it might be better to divide the 9 by 3 first.
     
    #3 Commy, Nov 9, 2007
  4. Charlie

    Charlie Level IV

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    I agree, If you had done this it would have been:

    1.2/x = 3

    1.2 = 3x

    x = 1.2/3

    x= 0.4
     
    #4 Charlie, Nov 12, 2007
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