anonymous
  • anonymous
What is the length (magnitude) of the vector (-4,2)? A. 3 B. 5 C. sqrt2 D. sqrt20
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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jamiebookeater
  • jamiebookeater
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geerky42
  • geerky42
|dw:1438831433965:dw|
geerky42
  • geerky42
Looks like we can apply Pythagorean theorem
anonymous
  • anonymous
2^2+4^2=c^2??

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anonymous
  • anonymous
do i just solve
geerky42
  • geerky42
well, you start with \(2^2 + (-4)^2=c^2\) but \((-4)^2\rightarrow4^2\)
geerky42
  • geerky42
but yeah you solve for c.
anonymous
  • anonymous
D sqrt 20?
geerky42
  • geerky42
Correct.
geerky42
  • geerky42
this is how you find the magnitude of vector.
anonymous
  • anonymous
oh Thanks easier than i thought
geerky42
  • geerky42
no problem

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