Results 1 to 2 of 2

Math Help - Absolute Value Q

  1. #1
    Newbie
    Joined
    Jan 2008
    Posts
    10

    Absolute Value Q

    Solve [3x +7]-9 = -10. Write the solution in interval notation.

    Well I solved the problem and arrived at:

    [-2 , -8/3]

    However, when I check my solutions neither satisfy the equation. So is the answer No Solution? I'm saying no solution because its not possible to make a -1 from the absolute value to add with -9.
    Follow Math Help Forum on Facebook and Google+

  2. #2
    Behold, the power of SARDINES!
    TheEmptySet's Avatar
    Joined
    Feb 2008
    From
    Yuma, AZ, USA
    Posts
    3,764
    Thanks
    78
    Quote Originally Posted by CODEONE View Post
    Solve [3x +7]-9 = -10. Write the solution in interval notation.

    Well I solved the problem and arrived at:

    [-2 , -8/3]

    However, when I check my solutions neither satisfy the equation. So is the answer No Solution? I'm saying no solution because its not possible to make a -1 from the absolute value to add with -9.

    I think your post is mistyped, but I think this is what you mean

    |3x+7|-9=-10

    if you isolate the absolute value you get...

    |3x+7|=-1 Since the absolute value is always non negative (0 or larger) the equation has no solutions.

    I hope this helps.
    B
    Follow Math Help Forum on Facebook and Google+

Similar Math Help Forum Discussions

  1. Replies: 2
    Last Post: September 7th 2011, 07:11 AM
  2. Replies: 8
    Last Post: May 23rd 2010, 10:59 PM
  3. finding absolute maximum and absolute minimum
    Posted in the Calculus Forum
    Replies: 1
    Last Post: November 15th 2009, 04:22 PM
  4. Replies: 2
    Last Post: November 8th 2009, 01:52 PM
  5. Find the absolute maximum and absolute minimum
    Posted in the Calculus Forum
    Replies: 5
    Last Post: December 12th 2008, 09:46 AM

Search Tags


/mathhelpforum @mathhelpforum