A community for students.

Here's the question you clicked on:

55 members online
  • 0 replying
  • 0 viewing

egbeach

  • one year ago

Evaluate the expression: v ⋅ w Given the vectors: r = <5, -5, -2>; v = <2, -8, -8>; w = <-2, 6, -5>

  • This Question is Closed
  1. myininaya
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 1

    multiply first components multiply second components multiply third components --- add those products to find the dot product

  2. egbeach
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    so i multiple all three together? even the r?

  3. myininaya
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 1

    v dot w the first components of both v and w are 2 and -2 respectively

  4. myininaya
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 1

    the second components of both v and w are -8 and 6 respectively

  5. myininaya
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 1

    the third components of both v and w are -8 and -5 respectively

  6. egbeach
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    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

  7. myininaya
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 1

    you have v dot w where is r? why do you want to include it?

  8. egbeach
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    i dont know. they just gave it to me in the equation and it confused me.

  9. myininaya
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 1

    I don't see it in v dot w I just v and w

  10. myininaya
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 1

    v dot w means you use v and w

  11. myininaya
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 1

    there is no r in "v dot w" so you don't use r

  12. myininaya
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 1

    are you able to finish the problem now?

  13. myininaya
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 1

    did you add the products I mentioned above: 2(-2)+(-8)(6)+(-8)(-5)?

  14. egbeach
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    yeah i did. i got -92

  15. myininaya
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 1

    -4-48+40 should give you something else

  16. Not the answer you are looking for?
    Search for more explanations.

    • Attachments:

Ask your own question

Sign Up
Find more explanations on OpenStudy
Privacy Policy

Your question is ready. Sign up for free to start getting answers.

spraguer (Moderator)
5 → View Detailed Profile

is replying to Can someone tell me what button the professor is hitting...

23

  • Teamwork 19 Teammate
  • Problem Solving 19 Hero
  • You have blocked this person.
  • ✔ You're a fan Checking fan status...

Thanks for being so helpful in mathematics. If you are getting quality help, make sure you spread the word about OpenStudy.

This is the testimonial you wrote.
You haven't written a testimonial for Owlfred.