Results 1 to 2 of 2

Math Help - Grade 12 Math Problems - Need help completing unit

  1. #1
    Newbie
    Joined
    Nov 2009
    Posts
    1

    Grade 12 Math Problems - Need help completing unit

    Hello, I've been ready to submit my first unit for advanced functions for grade 12 but I have some questions I am unsure of as no examples were provided. If anybody could kindly help me figure this all out it would be greatly appreciated. Some i've attempted and need to know if its right, and some I have no clue how to approach.

    Simplify, express each answer with positive exponent if possible.

    -45 x^5 y^7 z^9 / 9 x^7 y^7 z^5

    i got = -5 x^-2 z^4

    next question.

    (x ^a+b) ^a-b / (x ^a-2b) ^a+2b

    next question.

    find the equation for y
    x-axis as asymptote
    passes through points 0,-1 -1,-3 -2,-9


    Next question.

    Log5 20 +log5 10 - 3 log5 2
    =log5 200 - 3 log5 2
    =?

    Next question. evaluate each of the following

    7 ^(log7 12)

    log1/3 1

    log3 81"square root symbol" 27 under it.

    last question.

    an earthquake registers 6.1 on the richter scale. what is the rating on an earthquake that is twice as powerful?


    thank you.
    Follow Math Help Forum on Facebook and Google+

  2. #2
    Junior Member
    Joined
    Nov 2009
    Posts
    63
    Quote Originally Posted by Anthony90 View Post
    Next question.

    Log5 20 +log5 10 - 3 log5 2
    =log5 200 - 3 log5 2
    =?
    remember:
    (a) log(b) c = log(b) (c^a)
    log(5) 200- log(5) (2^3)

    remember:
     log(b) c - log(b) d= log(b) (\frac{c}{d})
    so,
    =log(5) (\frac{200} {2^3})
    =log(5) (\frac{200} {2^3})
    =log(5) (25)= log(5) (5^2)
    =(2) log(5) (5) =2


    ...hope it help...
    Follow Math Help Forum on Facebook and Google+

Similar Math Help Forum Discussions

  1. Grade 12 Math Problems
    Posted in the Trigonometry Forum
    Replies: 1
    Last Post: October 17th 2010, 09:36 PM
  2. Grade 10 math Help
    Posted in the Algebra Forum
    Replies: 2
    Last Post: January 13th 2010, 07:16 PM
  3. 2 math problems 9th grade~~
    Posted in the Algebra Forum
    Replies: 6
    Last Post: July 16th 2009, 01:58 PM
  4. Grade 11 Math Problems
    Posted in the Algebra Forum
    Replies: 2
    Last Post: June 16th 2008, 10:32 AM
  5. grade 10 math problems
    Posted in the Math Topics Forum
    Replies: 1
    Last Post: February 3rd 2008, 01:10 PM

Search Tags


/mathhelpforum @mathhelpforum