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anonymous

  • one year ago

What is the length (magnitude) of the vector (-4,2)? A. 3 B. 5 C. sqrt2 D. sqrt20

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  1. geerky42
    • one year ago
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    |dw:1438831433965:dw|

  2. geerky42
    • one year ago
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    Looks like we can apply Pythagorean theorem

  3. anonymous
    • one year ago
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    2^2+4^2=c^2??

  4. anonymous
    • one year ago
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    do i just solve

  5. geerky42
    • one year ago
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    well, you start with \(2^2 + (-4)^2=c^2\) but \((-4)^2\rightarrow4^2\)

  6. geerky42
    • one year ago
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    but yeah you solve for c.

  7. anonymous
    • one year ago
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    D sqrt 20?

  8. geerky42
    • one year ago
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    Correct.

  9. geerky42
    • one year ago
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    this is how you find the magnitude of vector.

  10. anonymous
    • one year ago
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    oh Thanks easier than i thought

  11. geerky42
    • one year ago
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    no problem

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