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horsealot203

Can someone just explain how to write the system of equations, and then how to graph it? Currently, Jodi has a collection of 44 CDs and Veronica has a collection of 22 CDs. Jodi is adding 2 CDs per month to her collection; Veronica plans to add 4 CDs per month. a. Write a system of equations for this situation. Explain your method. b. Graph the system of equations. Describe your graph. c. In how many months will they have the same number of CDs? What will be the number of CDs? Explain how you found the answer. d. At the end of 2 months, who will have more CDs?

  • one year ago
  • one year ago

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  1. Brittni0605
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    Let's let J represent Jodi's collection Let's let V represent Veronica's collection

    • one year ago
  2. horsealot203
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    What I had was: Let J represent Jodi, V represent Veronica, and x = the number of months. J = 44 + 2x V = 22 + 4x

    • one year ago
  3. Brittni0605
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    That is correct.

    • one year ago
  4. whpalmer4
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    So far, so good!

    • one year ago
  5. horsealot203
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    Ok. So then how do I graph that? My teacher said that we're supposed to use a graphing calculator.

    • one year ago
  6. Brittni0605
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    Do you have a graphing calc?

    • one year ago
  7. whpalmer4
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    Well, enter the two equations in your calculator and have it graph them. The point where they intersect is the point where they have the same number of CDs. If you drop a vertical line to the x-axis at that point, you can see how many months it took.

    • one year ago
  8. Brittni0605
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    If so, input J=44+2x for y1 and V=22+4x for y2

    • one year ago
  9. horsealot203
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    Yes I have a graphing calculator. So put in J=44+2x for y1 and V=22+4x for y2?

    • one year ago
  10. whpalmer4
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    I'm an old codger, I've never used one of those new-fangled contraptions, so I can't advise you on the details of which buttons to push :-)

    • one year ago
  11. horsealot203
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    Ok, thanks though :)

    • one year ago
  12. Brittni0605
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    Yes, you are right @horsealot203

    • one year ago
  13. horsealot203
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    Ok, so after I put in J=44+2x for y1 and V=22+4x for y2 how would I describe the graph?

    • one year ago
  14. Brittni0605
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    Well, one collection is obviously growing faster than the other based off of the slopes of the lines.

    • one year ago
  15. horsealot203
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    Ok, it looks like Veronica's collection is growing faster.

    • one year ago
  16. horsealot203
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    So for part c for in how many months they will have the same number of cds, that would be where the two line intersect right? So would I use the number on the y axis for the number of months right?

    • one year ago
  17. Brittni0605
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    That will be where your lines intersect. But your y axis is representing the number of CD's. The x axis is your months

    • one year ago
  18. horsealot203
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    Or would the y axis be the number of cds, and the x axis the number of months?

    • one year ago
  19. horsealot203
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    Oh, ok, I just saw your reply. Ok, thanks!

    • one year ago
  20. Brittni0605
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    Yw.

    • one year ago
  21. horsealot203
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    Oh, and this is a different question, but how do you give medals for responses?

    • one year ago
  22. Brittni0605
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    There's a blue box next to ppl's usernames that says 'best response'..just click the box next to the username you want the medal to go to

    • one year ago
  23. horsealot203
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    Ok thanks!

    • one year ago
  24. Brittni0605
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    Yw.

    • one year ago
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