Results 1 to 7 of 7

Math Help - How do I solve equations graphichally

  1. #1
    Junior Member
    Joined
    May 2009
    Posts
    29

    How do I solve equations graphichally

    Hi,
    How do I solve the following two equations graphically?

    2s + 10p = 1008
    3s + 16p = 1596

    And...

    30.99 + 87.48 - 305.73 = 0

    Never solved equations graphically,can someone show me where to start,how to I decide initial values

    Thanks...
    Follow Math Help Forum on Facebook and Google+

  2. #2
    Master Of Puppets
    pickslides's Avatar
    Joined
    Sep 2008
    From
    Melbourne
    Posts
    5,236
    Thanks
    28
    Quote Originally Posted by manich44 View Post
    Hi,
    How do I solve the following two equations graphically?

    2s + 10p = 1008
    3s + 16p = 1596

    A couple of methods spring to mind.

    You can graph the equations very carefully finding the intersection of the 2 lines. This is the solution point. But unless you have some graphing paper it will be quite difficult to find an accuarate answer.

    The other way is using a graphical calculator, do you have one?

    Quote Originally Posted by manich44 View Post

    And...

    30.99 + 87.48 - 305.73 = 0

    Never solved equations graphically,can someone show me where to start,how to I decide initial values

    Thanks...
    And.... that makes no sense, please read what you write before posting.
    Follow Math Help Forum on Facebook and Google+

  3. #3
    Super Member bigwave's Avatar
    Joined
    Nov 2009
    From
    honolulu
    Posts
    580

    Cool

    Quote Originally Posted by manich44 View Post
    Hi,
    How do I solve the following two equations graphically?

    2s + 10p = 1008
    3s + 16p = 1596

    And...

    30.99 + 87.48 - 305.73 = 0

    Never solved equations graphically,can someone show me where to start,how to I decide initial values

    Thanks...
    just to add to what has already been said

    to graph the lines
    set s=0 then solve for p to find the p-axis intercept
    set p=0 then solve for s to find the s-axis intercept
    these 2 points show where the lines are

    to solve for the intersection of the lines
    do a simultaneous equation
    Last edited by bigwave; December 16th 2009 at 12:12 PM. Reason: wording
    Follow Math Help Forum on Facebook and Google+

  4. #4
    Junior Member
    Joined
    May 2009
    Posts
    29

    RE How do I solve equations Graphically

    Hi
    No dont have a graphing calculator.Yes I know it can be done with graph paper but dont know where to start,how do I find initial values to start graph.I already know answer to simultaneous eqations s = 84 p = 84 just wanted to have a go graphically.

    And...30.99 + 87.48 - 305.73 = 0 or y = h3 + 87.48h-305.73=0

    I know it makes no sense,thats why I am looking for some help

    Thanks Mark
    Follow Math Help Forum on Facebook and Google+

  5. #5
    Super Member bigwave's Avatar
    Joined
    Nov 2009
    From
    honolulu
    Posts
    580

    Cool intercepts on the s and p axis

    have you found the intercepts on the s and p axis?
    for the 2 lines
    Follow Math Help Forum on Facebook and Google+

  6. #6
    Master Of Puppets
    pickslides's Avatar
    Joined
    Sep 2008
    From
    Melbourne
    Posts
    5,236
    Thanks
    28
    Quote Originally Posted by bigwave View Post

    to solve for the intersection of the lines
    do a simultaneous equation

    This is the best way, but its not what the poster has asked.


    Quote Originally Posted by bigwave View Post
    have you found the intercepts on the s and p axis?
    for the 2 lines
    manich44, do you know how to do this??

    recall,

    Quote Originally Posted by bigwave View Post
    to graph the lines
    set s=0 then solve for p to find the p-axis intercept
    set p=0 then solve for s to find the s-axis intercept
    this is good advice.
    Follow Math Help Forum on Facebook and Google+

  7. #7
    Master Of Puppets
    pickslides's Avatar
    Joined
    Sep 2008
    From
    Melbourne
    Posts
    5,236
    Thanks
    28
    Quote Originally Posted by manich44 View Post

    And...30.99 + 87.48 - 305.73 = 0 or y = h3 + 87.48h-305.73=0

    I know it makes no sense,thats why I am looking for some help
    but how did you arrive at this?
    Follow Math Help Forum on Facebook and Google+

Similar Math Help Forum Discussions

  1. equations solve
    Posted in the Differential Equations Forum
    Replies: 3
    Last Post: September 30th 2011, 06:46 AM
  2. Is it possible to solve these equations?
    Posted in the Calculus Forum
    Replies: 2
    Last Post: June 8th 2011, 02:43 PM
  3. solve the equations
    Posted in the Trigonometry Forum
    Replies: 5
    Last Post: October 28th 2009, 04:41 AM
  4. Please solve these equations!
    Posted in the Algebra Forum
    Replies: 1
    Last Post: January 15th 2008, 01:09 PM
  5. Please Help Me Solve These Log Equations!
    Posted in the Algebra Forum
    Replies: 2
    Last Post: October 2nd 2007, 11:07 AM

Search Tags


/mathhelpforum @mathhelpforum