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agillogly

help please.

  • one year ago
  • one year ago

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  1. agillogly
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    • one year ago
  2. MrMathmatician
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    The awnser is Deh

    • one year ago
  3. phi
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    |dw:1339443442759:dw| use pythagorean theorem to find the hypotenuse (length of the vector)

    • one year ago
  4. agillogly
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    like a^2+b^2=c^2? that would be 27.

    • one year ago
  5. phi
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    (-3)^2 + 6^2 = c^2 c^2= 9+36 = 45 can you find c?

    • one year ago
  6. phi
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    sqrt(45) which you can simplify by noticing sqrt(45)= sqrt(5*9)

    • one year ago
  7. agillogly
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    6.71

    • one year ago
  8. phi
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    But you want to use the same form that the answers are in. sqrt(45)= sqrt(5*9) can you simplify this?

    • one year ago
  9. phi
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    It is handy to know sqrt(a*b)= sqrt(a) * sqrt(b)

    • one year ago
  10. agillogly
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    [3\sqrt{5}\]

    • one year ago
  11. phi
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    yes. Choice A

    • one year ago
  12. phi
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    btw, notice that the length of the vector has to be bigger than 6 (its x component). (Lengths will always be positive). So you could eliminate choices B and D immediately.

    • one year ago
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