Quantcast

A community for students. Sign up today!

Here's the question you clicked on:

55 members online
  • 0 replying
  • 0 viewing

Nullify

  • 2 years ago

Evaluate the following expression using the values given. Find 4x - y - 2z if x = -2, y = 3, and z = -2

  • This Question is Closed
  1. dgo
    • 2 years ago
    Best Response
    You've already chosen the best response.
    Medals 2

    what are you having trouble with?

  2. dgo
    • 2 years ago
    Best Response
    You've already chosen the best response.
    Medals 2

    you substitute the values given for the appropriate variable then follow PEMDAS

  3. Nullify
    • 2 years ago
    Best Response
    You've already chosen the best response.
    Medals 1

    Substitute what values?

  4. dgo
    • 2 years ago
    Best Response
    You've already chosen the best response.
    Medals 2

    x = -2, y = 3, and z = -2

  5. dgo
    • 2 years ago
    Best Response
    You've already chosen the best response.
    Medals 2

    the numbers are values

  6. Nullify
    • 2 years ago
    Best Response
    You've already chosen the best response.
    Medals 1

    Ohh okay 1 sec

  7. Nullify
    • 2 years ago
    Best Response
    You've already chosen the best response.
    Medals 1

    is it 9?

  8. dgo
    • 2 years ago
    Best Response
    You've already chosen the best response.
    Medals 2

    no, first just sub the values and rewrite the full expression with the x y z

  9. dgo
    • 2 years ago
    Best Response
    You've already chosen the best response.
    Medals 2

    i mean without the x y z

  10. dgo
    • 2 years ago
    Best Response
    You've already chosen the best response.
    Medals 2

    you can rewrite it here

  11. dgo
    • 2 years ago
    Best Response
    You've already chosen the best response.
    Medals 2

    do u understand what im asking?

  12. Nullify
    • 2 years ago
    Best Response
    You've already chosen the best response.
    Medals 1

    4(-2) - 3 - 2(-2)

  13. dgo
    • 2 years ago
    Best Response
    You've already chosen the best response.
    Medals 2

    exactly! now do you know how to solve that?

  14. Nullify
    • 2 years ago
    Best Response
    You've already chosen the best response.
    Medals 1

    I do the ones in parentheses first right?

  15. dgo
    • 2 years ago
    Best Response
    You've already chosen the best response.
    Medals 2

    well parentheses come first, but here what is inside the parentheses is just a number, there nothing to do in there. so you actually do multiplication first. 4(-2) is just another way, a more clear way, of saying 4 * -2

  16. Nullify
    • 2 years ago
    Best Response
    You've already chosen the best response.
    Medals 1

    I did that and I got 8 - 3 - -4

  17. dgo
    • 2 years ago
    Best Response
    You've already chosen the best response.
    Medals 2

    4 * -2 actually equals -8

  18. Nullify
    • 2 years ago
    Best Response
    You've already chosen the best response.
    Medals 1

    Ohhhhh whoops

  19. dgo
    • 2 years ago
    Best Response
    You've already chosen the best response.
    Medals 2

    whenever you multiply a negative and a positive the answer is always negative

  20. Nullify
    • 2 years ago
    Best Response
    You've already chosen the best response.
    Medals 1

    Oh so it';s -7?

  21. dgo
    • 2 years ago
    Best Response
    You've already chosen the best response.
    Medals 2

    boom! nice job

  22. Nullify
    • 2 years ago
    Best Response
    You've already chosen the best response.
    Medals 1

    Haha, thanks!

  23. dgo
    • 2 years ago
    Best Response
    You've already chosen the best response.
    Medals 2

    :) good luck

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

    • Attachments:

Ask your own question

Ask a Question
Find more explanations on OpenStudy

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.