Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

Homework Help: Can I get a jump start in solving this

  1. Sep 1, 2003 #1
    Determine whether the following system is independent, inconsistent, or dependant.
    3x – 4y = 8

    0.75x – y = -2
     
  2. jcsd
  3. Sep 1, 2003 #2

    HallsofIvy

    User Avatar
    Science Advisor

    Are you saying that you do not know what "independent", "dependent", or "inconsistent" mean? I think you would be better served by looking up the definitions yourself in your text book.

    There are a number of ways of determining whether or not a system of equations is "independent" or "consistent" but the simplest is to try to solve the equations and see what happens.
     
  4. Sep 1, 2003 #3
    Is this correct?

    3x – 4y = 8
    .75x - y = -2
    so,
    -4(0.75x – y) = (-2)-4
    -3x + 4y = 8
    0=16 This is inconsistent
     
  5. Sep 2, 2003 #4

    HallsofIvy

    User Avatar
    Science Advisor

    Yep, you've got it!!
     
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook