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Math Help - 2 Applications on linear functions

  1. #1
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    2 Applications on linear functions

    Hi everybody
    I know already the solutions for these questions. But i can't find the way how to get it.

    1. question: A boutique owner starts her business with a debt of $100000. At the end of the 5th year, she has made a profit of $40000. Assuming that her profits rose linearly through the years, what was the rate of increase of her profit per year?
    solution: $28000

    I have no idea how to begin this problem..

    2. question: In the general form, the supply and demand functions are written as p-0.25q-8=0 and p+0.7q-12=0 respectively. p is given in $. Find and interpret the market equilibrium point.
    solution: $9

    0.25q + 8 = -0.7+12 --> an then I get 0.2375. I don't know how my teacher get to $9.


    Thank you very much for any advice and help.
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  2. #2
    MHF Contributor
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    Ottawa, Canada
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    Re: 2 Applications on linear functions

    Bobby, Bobby, Bobby.....
    application on functions
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