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

anonnnn Group Title

m,

  • one year ago
  • one year ago

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

    you used "substitution" BTW, y= -1/2 you substituted for y in the 2nd equation you could use "elimination" y = 1/2 x - 6 or 2y = x -12 (multiply both sides by 2) or x -2y = 12 (added -2y to both sides and +12 to both sides) so your first equation in standard form is x-2y=12 1x - 2y =12 <-- multiply both sides by -2 2x + 6y = 19 after multiplying both sides (every term) by -2 you get -2x + 4y = -24 2x + 6y = 19 now add the 2 equations together term by term can you do that?

    • one year ago
  2. phi Group Title
    Best Response
    You've already chosen the best response.
    Medals 1

    I just gave the highlights can you do y = 1/2 x - 6 becomes 2y= x-12

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

    2y= x-12 add -2y +12 to both sides 2y-2y+12= x-12-2y+12 can you simplify

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

    you get 12= x-2y which we can write as x-2y=12 (switching does not change anything)

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

    you mean -2 times both sides of x-2y=12 ? -2(x-2y) = -2*12 now simplify

    • one year ago
  6. phi Group Title
    Best Response
    You've already chosen the best response.
    Medals 1

    or should I say, "distribute" the -2 on the left and simplify on the right

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

    ? what did you do?

    • one year ago
  8. phi Group Title
    Best Response
    You've already chosen the best response.
    Medals 1

    first, recheck your first equation -2(x-2y) = -2*12 a minus times a minus give a plus

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

    Last step is to replace y with -1/2 in either equation and find x

    • one year 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.