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ccchristian1

  • one year ago

A pencil at a stationery store costs $1, and a pen costs $1.50. Shawn spent $12 at the store. He bought a total of 9 items. Which system of equations can be used to find the number of pencils (x) and pens (y) he bought? 1.5x + y = 12 x = 9y x + 1.5y = 12 x + y = 9 x + 9y = 12 x = 1.5y 9x + y = 12 x = 1.5y

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  1. ccchristian1
    • one year ago
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    @hysusonic

  2. hysusonic
    • one year ago
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    so you're supposed to have 1x + 1.50y =12

  3. hysusonic
    • one year ago
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    that's how much he spent and how many items he bought would be x+y=9

  4. hysusonic
    • one year ago
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    so which one looks like that?

  5. ccchristian1
    • one year ago
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    A?

  6. anonymous
    • one year ago
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    u can either use the 1st and 2nd one...or the 3rd and 1st one

  7. hysusonic
    • one year ago
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    no... A is saying that a pencil costs $1.50 when a pencil costs $1

  8. ccchristian1
    • one year ago
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    1.5x + y = 12 x = 9y x + 1.5y = 12 x + y = 9 x + 9y = 12 x = 1.5y 9x + y = 12 x = 1.5y

  9. ccchristian1
    • one year ago
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    so which one ?

  10. hysusonic
    • one year ago
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    well look at the formulas... 1x+1.5y=12 x+y=9

  11. hysusonic
    • one year ago
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    which one looks like that?

  12. ccchristian1
    • one year ago
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    B?

  13. hysusonic
    • one year ago
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    yup

  14. anonymous
    • one year ago
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    i quess b...will do

  15. anonymous
    • one year ago
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    rite

  16. anonymous
    • one year ago
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