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Homework Help: Adding variables with same exponents

  1. Dec 8, 2012 #1
    1. The problem statement, all variables and given/known data


    .2y^3 + .6y^3 - .5y^3

    I believe the answer to be .3y^3

    2. Relevant equations

    3. The attempt at a solution

    i got the answer to be .8y^3 - .5y^3

    = .3y^3

    I think this is correct, I'm not sure, please let me know if I finished this correctly.
  2. jcsd
  3. Dec 8, 2012 #2


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    hi rcmango! :smile:
    (try using the X2 button just above the Reply box :wink:)
    yes, that's fine :smile:

    .2y3 + .6y3 - .5y3

    = (.2 + .6 - .5)y3 = .3y3 (distributive law)
  4. Dec 9, 2012 #3
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