egbeach
  • egbeach
Evaluate the expression: v ⋅ w Given the vectors: r = <5, -5, -2>; v = <2, -8, -8>; w = <-2, 6, -5>
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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schrodinger
  • schrodinger
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myininaya
  • myininaya
multiply first components multiply second components multiply third components --- add those products to find the dot product
egbeach
  • egbeach
so i multiple all three together? even the r?
myininaya
  • myininaya
v dot w the first components of both v and w are 2 and -2 respectively

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myininaya
  • myininaya
the second components of both v and w are -8 and 6 respectively
myininaya
  • myininaya
the third components of both v and w are -8 and -5 respectively
egbeach
  • egbeach
so do i just ignore the r? thats what im asking. i know how to do v dot w but they also gave me the vector of r
myininaya
  • myininaya
you have v dot w where is r? why do you want to include it?
egbeach
  • egbeach
i dont know. they just gave it to me in the equation and it confused me.
myininaya
  • myininaya
I don't see it in v dot w I just v and w
myininaya
  • myininaya
v dot w means you use v and w
myininaya
  • myininaya
there is no r in "v dot w" so you don't use r
myininaya
  • myininaya
are you able to finish the problem now?
myininaya
  • myininaya
did you add the products I mentioned above: 2(-2)+(-8)(6)+(-8)(-5)?
egbeach
  • egbeach
yeah i did. i got -92
myininaya
  • myininaya
-4-48+40 should give you something else

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