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We are using TI-83 to figure out how to make an equation with a word problem. QuadReg

  1. Sep 26, 2012 #1
    1. The problem statement, all variables and given/known data
    A manufacturing company finds that it makes a profit of $20.00 on each article if 600 or fewer are made each week. The profit decreased by 2 cents per article over 600. How many additional articles should be produced per week in order to realized the maximum point?


    2. Relevant equations


    3. The attempt at a solution
    20y - 0.02y
     
  2. jcsd
  3. Sep 26, 2012 #2

    Ray Vickson

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    Re: We are using TI-83 to figure out how to make an equation with a word problem. Qua

    Is y equal the amount of production over 600 units? If so, you should say it, and not assume that the person marking your work is a mind-reader.

    Doesn't 20y - 0.02y = 19.98y just keep increasing forever as y increases? Your formula just keeps the profit fixed at $19.98 per unit produced; that is not what the question said.

    RGV
     
  4. Sep 26, 2012 #3
    Re: We are using TI-83 to figure out how to make an equation with a word problem. Qua

    Oh, im confused i just typed EXACTLY what the question said, my teacher probably made a mistake but do you think you could solve it anyway cuz i have no clue what this means
     
  5. Sep 26, 2012 #4

    Ray Vickson

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    Re: We are using TI-83 to figure out how to make an equation with a word problem. Qua

    What the teacher typed is clear and correct. The issue is what YOU typed, which is incorrect. And, yes, I can solve it, but the point is for YOU to solve it, or at least to make a start.

    Here are a couple of hints: what it the profit on item 601? What is the profit on item 602? On item 603? Keep going like that, and try to represent the result by a formula.

    RGV
     
    Last edited: Sep 26, 2012
  6. Sep 26, 2012 #5
    Re: We are using TI-83 to figure out how to make an equation with a word problem. Qua

    i Know how to do that, but it takes a long time. how do i make the equation
     
  7. Sep 26, 2012 #6

    Ray Vickson

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    Re: We are using TI-83 to figure out how to make an equation with a word problem. Qua


    I asked you three questions (about items 601, 602 and 603). What are your answers?

    As for getting an equation: that is the problem you need to solve. I am not allowed to give any more hints; it is up to you now.

    RGV
     
    Last edited: Sep 26, 2012
  8. Sep 26, 2012 #7
    Re: We are using TI-83 to figure out how to make an equation with a word problem. Qua

    EUREKA, i got it the answer is 200 more because the equ'n is -50x square plus 1600. thank you so much
     
  9. Sep 26, 2012 #8

    Mark44

    Staff: Mentor

    Re: We are using TI-83 to figure out how to make an equation with a word problem. Qua

    That's not the way it works on Physics Forums. From the rules (https://www.physicsforums.com/showthread.php?t=414380):
     
    Last edited: Sep 26, 2012
  10. Sep 26, 2012 #9
    Re: We are using TI-83 to figure out how to make an equation with a word problem. Qua

    oh ok, im sorry today is my first day on this website and this is probably gonna be the only time i use it but thank you Mark and Ray
     
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