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aliceglass20

Solve for x. 8/X=x/11

  • one year ago
  • one year ago

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  1. completeidiot
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    x=X? or are they different variables?

    • one year ago
  2. aliceglass20
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    No I meant to make them the same.

    • one year ago
  3. completeidiot
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    do you know how to cross multiply?

    • one year ago
  4. aliceglass20
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    forgot

    • one year ago
  5. completeidiot
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    cross multiplication ex.|dw:1346962247300:dw|

    • one year ago
  6. aliceglass20
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    but how do you know what x and y are?

    • one year ago
  7. meylispena
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    |dw:1346962226871:dw|

    • one year ago
  8. completeidiot
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    it was just an example x and y were just random variables

    • one year ago
  9. meylispena
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    you cross multiply, the 8 with the 11 and the x combine like terms. you have to get rid of the exponent by applying the square root.

    • one year ago
  10. aliceglass20
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    I know but in my problem also, how would you multiply two variables if they're not numbers/

    • one year ago
  11. aliceglass20
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    the square root of 8x11?

    • one year ago
  12. completeidiot
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    \[X*X=X^2\]

    • one year ago
  13. meylispena
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    |dw:1346962422728:dw|

    • one year ago
  14. aliceglass20
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    So would the answer be either be 44 or 88? @completeidiot @meylispena ?

    • one year ago
  15. meylispena
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    you have to find the square root of 88.

    • one year ago
  16. aliceglass20
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    But the only answer choices are 44, 22 square root of 2, 2 square root 22, and 88..

    • one year ago
  17. completeidiot
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    \[\sqrt{88}=\sqrt{4*22}=\sqrt{4}\sqrt{22}=2\sqrt{22}\]

    • one year ago
  18. aliceglass20
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    Oh..

    • one year ago
  19. aliceglass20
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    Thank you:)

    • one year ago
  20. meylispena
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    what completeidiot said, lol.

    • one year ago
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