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anonymous

  • one year ago

Sally made the conjecture that the sum of any two prime numbers is a prime number. Which equation is a counterexample to her conjecture? A. 15+4=19 B. 2+5=7 C. 3+11=14 D. 2+11=13

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  1. anonymous
    • one year ago
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    @Deadpool117 @mathmate @mathstudent55

  2. anonymous
    • one year ago
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    ._.

  3. anonymous
    • one year ago
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    what do u think?

  4. anonymous
    • one year ago
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    Maybe D or A

  5. Vocaloid
    • one year ago
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    well, we want an example of two prime numbers added together to make a number that isn't prime, so between 19, 7, 14, and 13, which one is NOT prime?

  6. anonymous
    • one year ago
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    14 is not a prime number @Vocaloid

  7. Vocaloid
    • one year ago
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    good job! so which one do you think is the answer?

  8. anonymous
    • one year ago
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    I think that the answer should be B

  9. Vocaloid
    • one year ago
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    no, please try again and look at the answer choices... which one has a sum of 14?

  10. anonymous
    • one year ago
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    Oh so the answer would be c

  11. Vocaloid
    • one year ago
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    good

  12. anonymous
    • one year ago
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    @Vocaloid Thanks for the help

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