A community for students.

Here's the question you clicked on:

55 members online
  • 0 replying
  • 0 viewing

anonymous

  • 2 years ago

Help! The question is attached!

  • This Question is Closed
  1. anonymous
    • 2 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    Attempt to solve for x! (4,y) and (7,-6); slope:-4

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

    \[\frac{ -6-y }{ 7-4 }=-4\] \[\frac{ -6-y }{ 3 }=-4 \] I just set it up like the normal slope equation, (y2-y1)/(x2-x1). Now just see if you can solve for y.

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

    Olay, let me try it out for myself to see if I understand it

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

    Alrighty.

  5. anonymous
    • 2 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    Wait, I get -6 / 3 how did you get -4?

  6. anonymous
    • 2 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    You said the slope = -4, right? Well, the result of (y2-y1)/(x2-x1) is slope. But we already have the slope, so I just set the equation equal to -4.

  7. anonymous
    • 2 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    Ahhhhhh okay I see how you set it up!

  8. anonymous
    • 2 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    And then you subtract the bottom, correct?

  9. anonymous
    • 2 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    Yeah, which left me with \[\frac{ -6-y }{ 3 }=-4 \]Would you know how to use that to solve for y?

  10. anonymous
    • 2 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    My guess is that I multiply -6 and 3

  11. anonymous
    • 2 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    Just multiply both sides by 3 to start.

  12. anonymous
    • 2 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    That will cancel the 3 out of the denominator of the fraction.

  13. anonymous
    • 2 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    So would it be 18+3y=-4

  14. anonymous
    • 2 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    Nah. Okay, so we multiply both sides by 3 and it looks liek this: \[\frac{ 3(-6-y) }{ 3 }=-4(3)\]From here, the 3's on the left cancel out and -4 and 3 multiplies to get: \[-6-y = -12 \] Kinda see why?

  15. anonymous
    • 2 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    Yea aha I sorta do, it's because I got -18-3y=-12 when I multiplied it by 3

  16. anonymous
    • 2 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    Yeah, but you dont multiply the -6 and the -y by 3. Because you have a 3 on top and bottom, they cancel out and become 1. That is the whole purpose of multiply by 3 is because itll get rid of the denominator. It's just like if we had: \[\frac{ x }{ 3 }=3 \]Because x is divided by 3, to get it by itself we do the opposite operation and multiply by 3. |dw:1378605836732:dw| Same thing with our problem: |dw:1378605874087:dw|

  17. anonymous
    • 2 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    Ahhhhhh okay I see now! And then after I get -6-y=-12 I add 6 to both sides

  18. anonymous
    • 2 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    Right.

  19. anonymous
    • 2 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    When I divide y to both sides, would I be dividing -y or just y?

  20. anonymous
    • 2 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    Well if you have -y = -6, it does no good to divide by y or -y. If you divided by -y you get: \[1=\frac{ 6 }{ y } \] You just want to divide by -1 is all to get y by itself.

  21. anonymous
    • 2 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    And the final answer will be y=6

  22. anonymous
    • 2 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    Bingo. Can even test it :3 \[\frac{ -6-6 }{ 7-4 }=\frac{ -12 }{ 3 }=-4 \] So yep, works :3

  23. anonymous
    • 2 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    Thank you much, you explained very well unlike most people here :D do you have time to help me with another 3 problems I had trouble with?

  24. 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.