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anonymous

  • one year ago

Which shows the number 28 factored into prime numbers? A. 4 · 7 B. 1· 2 · 2 · 7 C. 2 · 2 · 7 D. 3 · 7

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  1. LifeIsADangerousGame
    • one year ago
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    The definition of prime means that the you can only get the number by multiplying itself by 1. For instance 2: You can only get two by multiplying 1 and 2 together. So which provided answer fits that definition AND equals 28 once you multiply it out?

  2. anonymous
    • one year ago
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    sorry doun't understand

  3. LifeIsADangerousGame
    • one year ago
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    It's okay! Let's make a factoring tree. 28 is the number you start with. |dw:1442605156919:dw|

  4. LifeIsADangerousGame
    • one year ago
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    So what I did was, I broke it down. 28 is equal to 4 * 7, but we want to get all the way to the lowest numbers possible, so we kept going. 4 is equal to 2 * 2 so you write that below the four. Then 7 is a prime number already so you put 7 * 1 So, the prime numbers you need to make 28 are: 2 * 2 * 7 * 1

  5. LifeIsADangerousGame
    • one year ago
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    Does that make more sense?

  6. anonymous
    • one year ago
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    i think? so sorry

  7. LifeIsADangerousGame
    • one year ago
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    It's okay! Which part don't you understand?

  8. anonymous
    • one year ago
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    ok first i gonna tell you which answer i think it is its okay for you

  9. LifeIsADangerousGame
    • one year ago
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    Sure

  10. anonymous
    • one year ago
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    i think is B.

  11. LifeIsADangerousGame
    • one year ago
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    You're correct! But do you know why?

  12. anonymous
    • one year ago
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    nop:(

  13. LifeIsADangerousGame
    • one year ago
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    Okay, give me two minutes and I will explain!

  14. anonymous
    • one year ago
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    all write its ok

  15. anonymous
    • one year ago
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    you have help me to much and if i have sometin hels to give you i will doit

  16. LifeIsADangerousGame
    • one year ago
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    That was a bit longer than two minutes, I'm sorry! I can always try to explain it later on if you'd like.

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