A community for students.

Here's the question you clicked on:

55 members online
  • 0 replying
  • 0 viewing

Littlebird

  • one year ago

Is this a system of equations? 4x-y=4 -4x+y=-4

  • This Question is Closed
  1. ganeshie8
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 1

    linear system of two dependent equations

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

    How do I find out if it has a solution?

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

    Graph it or solve it

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

    Multiply -1 to the 2nd equation..what do you get?

  5. texaschic101
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 2

    A system of equations is a collection of 2 or more equations with the same set of unknowns

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

    In both equations, when solving for y,I got y=4x-4 Does that mean they have no solution, or one unique solution?

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

    \(\sf (-4x + y = -4) \cdot -1 = ~ \! ?\)

  8. texaschic101
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 2

    wrong answer....do what igreen says...it will eventually make sense to you

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

    4x-y=4

  10. texaschic101
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 2

    oh..I see what you did LittleBird...you see that both equations are equal...they are the same. That means they are the same line......infinite solutions

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

    I have another similar problem where the lines are parallel. Does that mean they have no solution?

  12. texaschic101
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 2

    Little lesson.. (when finding out how many solutions a system of equations have) In y = mx + b form, the slope is in the m position and the y intercept is in the b position. (when comparing a system of equations).. If the slope and the y intercepts are equal, then it has infinite solutions if the slope is the same, but the y intercepts are different...parallel lines with no solutions. if the slopes and the y intercepts are different, then it has 1 solution

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

    That is exactly what I needed to know! Thanks!

  14. texaschic101
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 2

    anytime :)

  15. 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.