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Math Help - Working out total cost

  1. #1
    JTE
    JTE is offline
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    Working out total cost

    If someone could give me the breakdown of how you get the final answer in this equation I will love you forever Just need to know how you get 57 so I can apply the same theory to other problems!

    I have done it on paint because I haven't got a clue how to write cubed and squared on a keyboard




    Thanks very much
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  2. #2
    JTE
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    With C being Cost...
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  3. #3
    is up to his old tricks again! Jhevon's Avatar
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    Quote Originally Posted by JTE View Post
    If someone could give me the breakdown of how you get the final answer in this equation I will love you forever Just need to know how you get 57 so I can apply the same theory to other problems!

    I have done it on paint because I haven't got a clue how to write cubed and squared on a keyboard




    Thanks very much
    just work it out piece by piece.

    3^3 = 27

    10(3)^2 = 10(9) = 90

    40(3) = 120



    thus, c(3) =  3^3 - 10(3)^2 + 40(3) = 27 - 90 + 120 = 57
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