Quantcast

Got Homework?

Connect with other students for help. It's a free community.

  • across
    MIT Grad Student
    Online now
  • laura*
    Helped 1,000 students
    Online now
  • Hero
    College Math Guru
    Online now

Here's the question you clicked on:

55 members online
  • 0 replying
  • 0 viewing

0mgl0la Group Title

How do you solve? 3x + 3y + 2z = –5 x + y + 3z = –4 2x + 2y + 5z = –7

  • 2 years ago
  • 2 years ago

  • This Question is Closed
  1. Monkeyball Group Title
    Best Response
    You've already chosen the best response.
    Medals 0

    using matrices

    • 2 years ago
  2. Monkeyball Group Title
    Best Response
    You've already chosen the best response.
    Medals 0

    can you set up the augmented matrix?

    • 2 years ago
  3. UnkleRhaukus Group Title
    Best Response
    You've already chosen the best response.
    Medals 0

    add the second and third equations, and find the difference with the first equation, hence solve for z

    • 2 years ago
  4. Monkeyball Group Title
    Best Response
    You've already chosen the best response.
    Medals 0

    or you can do matrices.

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

    3x + 3y + 2z = –5 -(1) x + y + 3z = –4 -(2) 2x + 2y + 5z = –7 -(3) (2)x(-2) + (2) -2 (x + y + 3z) + (2x + 2y + 5z) = -2(-4) + (-7) -z = 1 z= -1 Sub z=-1 into the equations. Solve x and y. If I haven't got that wrong, there should be infinitely many solutions for x and y. Sorry, I made a mistake in the deleted post.

    • 2 years ago
    • Attachments:

See more questions >>>

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.