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GenTorr

  • one year ago

Choose a number line to model the following situation: Marcy owed her friend Erica $25 dollars and paid her back $15.

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  1. GenTorr
    • one year ago
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  2. GenTorr
    • one year ago
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    @Michele_Laino

  3. triciaal
    • one year ago
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    hint: when you owe you are in the red you are negative when you add you go right

  4. calculusxy
    • one year ago
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    Zero would be the amount that Marcy had previously. However, she borrowed $25 from her friend, which means that from her balance, she knows that she needs to give back that $25 (thus it is negative). However, she has only paid back $15, that means that she has only $10 remaining to give back and then she will get out from the negative range, so the arrow went to the right. From this information that I have given you, can you tell me what number line that would be?

  5. Michele_Laino
    • one year ago
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    your problem can be modeled by this expression: \[\Large - 25 + 15\] since negative numbers are used to represent debts, whereas positive numbers are used to represent credits

  6. GenTorr
    • one year ago
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    i think its the first one

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