Results 1 to 7 of 7

Math Help - Solve and graph?

  1. #1
    Newbie
    Joined
    Jul 2009
    Posts
    4

    Solve and graph?

    y=|x|-5
    3x-1=6x+y

    so confused. please help.
    Follow Math Help Forum on Facebook and Google+

  2. #2
    No one in Particular VonNemo19's Avatar
    Joined
    Apr 2009
    From
    Detroit, MI
    Posts
    1,823
    Quote Originally Posted by sonataplease View Post
    ...so confused. please help.
    Me too. Are trying to solve the system of the two equations. Or are you tryin to solve each independently?

    This could help

    y=-x-5, x\leq0

    y=x-5 x>0
    Follow Math Help Forum on Facebook and Google+

  3. #3
    Newbie
    Joined
    Jul 2009
    Posts
    4
    Quote Originally Posted by VonNemo19 View Post
    Me too. Are trying to solve the system of the two equations. Or are you tryin to solve each independently?

    This could help

    y=-x-5, x\leq0

    y=x-5 x>0
    sorry, shoulda specified... independently.

    I am afraid I don't understand the equations you posted either. I am horrid at math.
    Follow Math Help Forum on Facebook and Google+

  4. #4
    No one in Particular VonNemo19's Avatar
    Joined
    Apr 2009
    From
    Detroit, MI
    Posts
    1,823
    Quote Originally Posted by sonataplease View Post
    sorry, shoulda specified... independently.

    I am afraid I don't understand the equations you posted either. I am horrid at math.
    Well, then, there is no way to "solve" these equations because there are two variables (x and y). But we CAN graph them.

    If you look at my last post, you'll see that I "broke up" the first equation into two seperate equations. If you sketch the graph, it'll look like a v.
    Follow Math Help Forum on Facebook and Google+

  5. #5
    Newbie
    Joined
    Jul 2009
    Posts
    4
    Quote Originally Posted by VonNemo19 View Post
    Well, then, there is no way to "solve" these equations because there are two variables (x and y). But we CAN graph them.

    If you look at my last post, you'll see that I "broke up" the first equation into two seperate equations. If you sketch the graph, it'll look like a v.
    I see... The second equation... how do I go about figuring that one? I graphed the first, did get a v.
    Follow Math Help Forum on Facebook and Google+

  6. #6
    No one in Particular VonNemo19's Avatar
    Joined
    Apr 2009
    From
    Detroit, MI
    Posts
    1,823
    Quote Originally Posted by sonataplease View Post
    I see... The second equation... how do I go about figuring that one? I graphed the first, did get a v.
    Solve for y:

    3x-1=6x+y

    3x-6x-1=6x-6x+y

    -3x-1=0+y

    y=-3x-1

    You can see that this is a linear equation of the form y=mx+b, where m=-3 is the slope of the line, and b=-1 is the y-intercept.

    You can use the y-intercept along with the slope of the line to sketch the graph. Or you could use the y-intercept along with another point (ie (1,-4)) to draw the graph. Either way is fine.
    Follow Math Help Forum on Facebook and Google+

  7. #7
    Newbie
    Joined
    Jul 2009
    Posts
    4
    Quote Originally Posted by VonNemo19 View Post
    Solve for y:

    3x-1=6x+y

    3x-6x-1=6x-6x+y

    -3x-1=0+y

    y=-3x-1

    You can see that this is a linear equation of the form y=mx+b, where m=-3 is the slope of the line, and b=-1 is the y-intercept.

    You can use the y-intercept along with the slope of the line to sketch the graph. Or you could use the y-intercept along with another point (ie (1,-4)) to draw the graph. Either way is fine.
    THANK YOU!!!
    Follow Math Help Forum on Facebook and Google+

Similar Math Help Forum Discussions

  1. graph to solve
    Posted in the Pre-Calculus Forum
    Replies: 7
    Last Post: January 5th 2010, 10:38 PM
  2. solve and graph
    Posted in the Algebra Forum
    Replies: 4
    Last Post: June 19th 2007, 12:37 PM
  3. solve and Graph the inequalities
    Posted in the Pre-Calculus Forum
    Replies: 2
    Last Post: March 27th 2007, 01:20 AM
  4. solve and graph
    Posted in the Algebra Forum
    Replies: 1
    Last Post: July 18th 2005, 12:20 AM
  5. solve and graph
    Posted in the Algebra Forum
    Replies: 1
    Last Post: July 13th 2005, 10:12 PM

Search Tags


/mathhelpforum @mathhelpforum