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

trentsellars Group Title

solve the system: y= -1/3 + 2 and x + 3y = 3

  • 2 years ago
  • 2 years ago

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

    -1/3x*

    • 2 years ago
  2. kmalone99 Group Title
    Best Response
    You've already chosen the best response.
    Medals 0

    x+3y=3 substrct x from both sides what would you get?

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

    3y=-x+3?

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

    id set them both equal to y then solve like that

    • 2 years ago
  5. kmalone99 Group Title
    Best Response
    You've already chosen the best response.
    Medals 0

    ar you can sub y=-1/3x+2 in to other equation x+3(-1/3 x+x)=3 solve for x

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

    what?

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

    since y equals -1/3x+2 we can substitute that into the second equation like this:\[x+3(-1/3 x+2)=3\]and then solve for x:\[x-3x+6=3\]\[-2x+6=3\]\[-2x=-3\]\[x=3/2\] now substitute this x into the first equation:\[y=-1/3(3/2)+2\]\[y=-1/2+2\]\[y=-5/2\] \[{x=3/2~~~~~~~~y=-5/2}\]

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

    okay I see the first part. but the problem with -5/2, is that thats not one of the answer options. but 3/2, 0 is

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

    oh sorry 1 second

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

    \[x+3(−1/3x+2)=3\] and then solve for x: \[x−x+6=3\]\[0x+6=3\]\[0x=−3\]\[x=0\] now substitute this x into the first equation: \[y=−1/3(0)+2\]\[y=0+2\]\[y=2\] \[x=0~~~y=2\]

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

    is that one of the choices? sorry i did that wrong but i fixed it...helpful? :)

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

    (0, 1) (1, 0) (3, 1/3) (3/2, 0) these are the options.

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

    im so confused .-.

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

    its A

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

    how?

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

    y has to equal 1 when x is 0

    • 2 years ago
  17. jim_thompson5910 Group Title
    Best Response
    You've already chosen the best response.
    Medals 0

    yummydum, if 0x=−3, then 0 = -3 which is a contradiction So there are no solutions.

    • 2 years ago
  18. kmalone99 Group Title
    Best Response
    You've already chosen the best response.
    Medals 0

    besides the mistake then you .. wait if you have choses then the order pair are (x,y) sub into the equations example take the first one 0,1 y= -1/3 + 2 and x + 3y = 3 1=-1/3(0)+2 and 0+3(1)=3 1=2 not a solutation and 3=3 solves right equations so do the next set of pairs and tell me what you find out

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

    damn im confused...

    • 2 years ago
  20. kmalone99 Group Title
    Best Response
    You've already chosen the best response.
    Medals 0

    is that all the possiablities? there is no solutions be these are parallal lines

    • 2 years ago
  21. kmalone99 Group Title
    Best Response
    You've already chosen the best response.
    Medals 0

    sorry your confused but it says solve so look at what we have sub the points in the equations and see if it equals or solve for x or y and then find what you did nt solve for... do you understand this

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

    there is a no solution

    • 2 years ago
  23. jim_thompson5910 Group Title
    Best Response
    You've already chosen the best response.
    Medals 0

    i would be confused too...the answer choices are incorrect because the true answer is "no solution" or "there is/are no solution(s)"

    • 2 years ago
  24. jim_thompson5910 Group Title
    Best Response
    You've already chosen the best response.
    Medals 0

    so there must be a typo somewhere

    • 2 years ago
  25. kmalone99 Group Title
    Best Response
    You've already chosen the best response.
    Medals 0

    there is your answer but do you understand why?

    • 2 years ago
  26. kmalone99 Group Title
    Best Response
    You've already chosen the best response.
    Medals 0

    i think i got this jim_thompson5910

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

    yeah i do thanks :)

    • 2 years ago
  28. kmalone99 Group Title
    Best Response
    You've already chosen the best response.
    Medals 0

    great you also can see let equations equal -1/3 x+2=-1/3 x+1and solve for x then you get 2=1 so no solution. :-)

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

    another way to look at \[y= -\frac{1}{3}x + 2 \text { and } x + 3y = 3\] the 2nd equation, after rearranging into y= mx+b form is \[ y= -\frac{1}{3}x+3\] You have two lines that are parallel, and never meet. There is no (x,y) pair that is on both lines (as would be the case if they intersected)

    • 2 years ago
  30. kmalone99 Group Title
    Best Response
    You've already chosen the best response.
    Medals 0

    already said this phi

    • 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.