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Math Help - rate of change and functions

  1. #1
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    rate of change and functions

    One printer (z) can print out x characters per second, and a second printer(w) can print y characters per second. If the first prints for 50 seconds, and the second for 60 seconds to make a total f 12200 characters, find the equation relating x and y.

    x(50)+y(60)=12200
    t(1)+t(2)=110 seconds.
    but i don't get how to blend them to one function.
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  2. #2
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    Quote Originally Posted by jacielmc View Post
    One printer (z) can print out x characters per second, and a second printer(w) can print y characters per second. If the first prints for 50 seconds, and the second for 60 seconds to make a total f 12200 characters, find the equation relating x and y.

    x(50)+y(60)=12200 this answers the question ... you're done.
    ...
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  3. #3
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    Quote Originally Posted by jacielmc View Post
    One printer (z) can print out x characters per second, and a second printer(w) can print y characters per second. If the first prints for 50 seconds, and the second for 60 seconds to make a total f 12200 characters, find the equation relating x and y.

    x(50)+y(60)=12200
    t(1)+t(2)=110 seconds.
    but i don't get how to blend them to one function.
    50x + 60y = 12200
    If you solve for x or y, you then have a function of y or x that is related to x or y.
    y = \frac{12200 - 50x}{60}

    edit: Yeah, like the person above me said, you can stop at 50x + 60y = 12200, and you're done.
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