Results 1 to 7 of 7

Math Help - Praxis help please

  1. #1
    Newbie
    Joined
    Feb 2009
    From
    chattanooga tn
    Posts
    13

    Praxis help please

    If xRy = x-y = 7t

    Is the equation:
    reflexive
    symmetric
    transitive
    Follow Math Help Forum on Facebook and Google+

  2. #2
    MHF Contributor

    Joined
    Aug 2006
    Posts
    18,605
    Thanks
    1574
    Awards
    1
    Quote Originally Posted by tigerpaw View Post
    If xRy = x-y = 7t

    Is the equation:
    reflexive
    symmetric
    transitive
    You need to show some work.
    At least explain what you don't understand.
    BTW: R appears to be a relation. Is that correct?
    What is t?
    Follow Math Help Forum on Facebook and Google+

  3. #3
    Newbie
    Joined
    Feb 2009
    From
    chattanooga tn
    Posts
    13
    thank you for your help. I read xRy as x is related to y which normally indicates an ordered pair.

    I am confused from that point, the only remaining question then reads then x y = 7t and if this equation is reflexive and/or symmetric and/or transitive

    thanks
    Follow Math Help Forum on Facebook and Google+

  4. #4
    MHF Contributor

    Joined
    Aug 2006
    Posts
    18,605
    Thanks
    1574
    Awards
    1
    Well first I find it hard to think a Praxis question is so poorly written.
    This is not an equation but rather set of ordered pairs.
    Each pair (x,y) is in the collection is there if and only if x  y = 7t for some t.
    Reflexive: Is 7 \cdot 0 = x - x true for every x?
    Symmetric: If x - y = 7t does it follow that y - x = 7( - t)?
    Transitive: x - y = 7t\;\& \,y - z = 7s\, \Rightarrow \,x - z = 7(t + s).

    May I ask, what level of the Praxis are you studying for? Is it the subject matter area test?
    Follow Math Help Forum on Facebook and Google+

  5. #5
    Newbie
    Joined
    Feb 2009
    From
    chattanooga tn
    Posts
    13
    Absolutely, it is the Praxis II High school math content knowledge.

    A great number of the questions are extremely vague with little information.

    I have a few more questions that I have seen if you are interested. thanks
    Follow Math Help Forum on Facebook and Google+

  6. #6
    MHF Contributor

    Joined
    Aug 2006
    Posts
    18,605
    Thanks
    1574
    Awards
    1
    Quote Originally Posted by tigerpaw View Post
    Absolutely, it is the Praxis II High school math content knowledge. A great number of the questions are extremely vague with little information.
    I have a few more questions that I have seen if you are interested.
    I have both written for and edited for these test.
    Do you realize that the area exam of the Praxis assumes an equivalence of an undergraduate major in the subject matter?
    Many U.S. states have adopted that standard for secondary certification.
    In mathematics that becomes a great problem!
    Here in the states it is relatively easy to move among several subject disciplines.
    BUT, that is not our experience with mathematics.
    Unfortunately we have found that a complete undergraduate course in mathematics was a prerequisite for passing the Praxis subject area test in mathematics.

    You need to know that finding.
    Follow Math Help Forum on Facebook and Google+

  7. #7
    Newbie
    Joined
    Feb 2009
    From
    chattanooga tn
    Posts
    13
    thank you, that I have discovered and I have sought the additional courses. I teach in a very low income rural county school with an enrollment close to 450 students. I agree with your statement regarding the the undergraduate experience and accompanying technical knowledge needed to pass the Praxis. I teach basic algebra and geometry to students who fall thru the cracks and fight to keep them in school. As imagined, I have struggled with the advanced portions of the exam. Also, many of the views seen in the discrete portion of the subject matter have been difficult. regardless, thank you for your help.
    Follow Math Help Forum on Facebook and Google+

Similar Math Help Forum Discussions

  1. roots between 100π and 1000π Praxis II
    Posted in the Trigonometry Forum
    Replies: 1
    Last Post: February 24th 2009, 06:46 PM
  2. Praxis II question
    Posted in the Advanced Statistics Forum
    Replies: 1
    Last Post: February 16th 2009, 04:54 PM
  3. Help with Teachers' PRAXIS II (0061) Exam
    Posted in the Advanced Algebra Forum
    Replies: 0
    Last Post: April 15th 2006, 06:11 PM

Search Tags


/mathhelpforum @mathhelpforum