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WhiteRabbit Group Title

You can buy DVDs at a local store fro $15.49 each. You can buy them at an online sore for $13.99 each plus $6 for shipping. How many DVDs can you buy for the same amount at the two stores?

  • 2 years ago
  • 2 years ago

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  1. tjones89 Group Title
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    for this problem you need to create two equations; one that represents the amount of money it would cost to buy a certain amount of movies from the store, and another that shows the money it costs to buy a certain amount of movies online.

    • 2 years ago
  2. WhiteRabbit Group Title
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    d = 15.49 and o = 13.99 + 6?

    • 2 years ago
  3. tjones89 Group Title
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    what you need in those equations is a variable to represent the number of movies

    • 2 years ago
  4. WhiteRabbit Group Title
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    m???

    • 2 years ago
  5. tjones89 Group Title
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    because if I buy 2 movies from the store it will be 2 * $15.49

    • 2 years ago
  6. tjones89 Group Title
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    so lets let x = the number of movies I want to buy and y is the amount of money it costs

    • 2 years ago
  7. tjones89 Group Title
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    if I buy from the store I multiply the number of movies I want to buy times the price of each movie right?

    • 2 years ago
  8. WhiteRabbit Group Title
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    why not m and c?

    • 2 years ago
  9. tjones89 Group Title
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    that works too. m for movies and c for cash?

    • 2 years ago
  10. WhiteRabbit Group Title
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    uhhuh ^^

    • 2 years ago
  11. tjones89 Group Title
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    so the way we can represent the price of movies at the local store is with 15.49m = c

    • 2 years ago
  12. tjones89 Group Title
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    that make sense?

    • 2 years ago
  13. WhiteRabbit Group Title
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    *nods*

    • 2 years ago
  14. tjones89 Group Title
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    now we can make another equation that shows the price of buying movies online. Can you make that one?

    • 2 years ago
  15. WhiteRabbit Group Title
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    i can one sec

    • 2 years ago
  16. WhiteRabbit Group Title
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    13.99m + 6 = c

    • 2 years ago
  17. tjones89 Group Title
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    good

    • 2 years ago
  18. WhiteRabbit Group Title
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    ^^

    • 2 years ago
  19. tjones89 Group Title
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    so now the problem asks us how many movies we can buy with the same amount of money at the two stores or for what value of m will both of our equations result in the same number c

    • 2 years ago
  20. WhiteRabbit Group Title
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    hmm can we combine them?

    • 2 years ago
  21. tjones89 Group Title
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    and since 13.99m + 6 = c and 15.49m = c we can set these equations equal to each other because we're assuming c is the same number in both

    • 2 years ago
  22. tjones89 Group Title
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    its like saying 2+2 = 4 and 1 +3 =4 so we can say that 1 + 3 = 2 + 2

    • 2 years ago
  23. WhiteRabbit Group Title
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    29.48m + 6 = c?

    • 2 years ago
  24. WhiteRabbit Group Title
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    oh ota, so 15.49m = 13.99m + 6

    • 2 years ago
  25. tjones89 Group Title
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    yep

    • 2 years ago
  26. WhiteRabbit Group Title
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    ^^

    • 2 years ago
  27. tjones89 Group Title
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    can you solve from here?

    • 2 years ago
  28. WhiteRabbit Group Title
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    i think so

    • 2 years ago
  29. tjones89 Group Title
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    let me know what you get

    • 2 years ago
  30. WhiteRabbit Group Title
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    m = 4

    • 2 years ago
  31. tjones89 Group Title
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    yep

    • 2 years ago
  32. WhiteRabbit Group Title
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    61.96 = c

    • 2 years ago
  33. tjones89 Group Title
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    the question didnt ask for that, but yeah good job!

    • 2 years ago
  34. WhiteRabbit Group Title
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    it bothers me if i don't solve for all variables ... sorry

    • 2 years ago
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