Results 1 to 2 of 2

Thread: geometry and indices/log problem

  1. #1
    Junior Member
    Joined
    Jun 2008
    Posts
    53

    geometry and indices/log problem

    1.
    A parallelogram PQRS with area ($\displaystyle 1+2\sqrt{7}$) $\displaystyle units^2$ has length PQ ($\displaystyle 3+\sqrt{7}$) units. Given that the distance between the two parallel sides, SR and PQ is ($\displaystyle a+b\sqrt{c}$) units where a, b and c are integers. Find, without using a calculator, the values of a, b and c.

    2.
    Given that $\displaystyle y=18+ax^b$ , y=56 when x=4 and y=20 when x=2.5, find the value of a and b.
    Follow Math Help Forum on Facebook and Google+

  2. #2
    MHF Contributor kalagota's Avatar
    Joined
    Oct 2007
    From
    Taguig City, Philippines
    Posts
    1,026
    Quote Originally Posted by wintersoltice View Post
    1.
    A parallelogram PQRS with area ($\displaystyle 1+2\sqrt{7}$) $\displaystyle units^2$ has length PQ ($\displaystyle 3+\sqrt{7}$) units. Given that the distance between the two parallel sides, SR and PQ is ($\displaystyle a+b\sqrt{c}$) units where a, b and c are integers. Find, without using a calculator, the values of a, b and c.

    2.
    Given that $\displaystyle y=18+ax^b$ , y=56 when x=4 and y=20 when x=2.5, find the value of a and b.
    1.
    $\displaystyle A_{\mbox{parallelogram}} = Bh$

    where $\displaystyle B= 3+\sqrt{7}$, $\displaystyle h=a+b\sqrt{c}$ and $\displaystyle A = 1+2\sqrt{7}$

    2. just solve the system:

    56 = 18 + a(4)^b
    20 = 18 + a(2.5)^b
    Follow Math Help Forum on Facebook and Google+

Similar Math Help Forum Discussions

  1. Indices Problem!
    Posted in the Algebra Forum
    Replies: 5
    Last Post: Mar 13th 2011, 03:34 AM
  2. indices problem
    Posted in the Algebra Forum
    Replies: 1
    Last Post: Oct 11th 2010, 04:27 AM
  3. Little Indices Problem
    Posted in the Algebra Forum
    Replies: 6
    Last Post: Jul 22nd 2010, 05:07 AM
  4. indices problem
    Posted in the Algebra Forum
    Replies: 3
    Last Post: May 8th 2010, 04:48 PM
  5. Indices problem
    Posted in the Algebra Forum
    Replies: 1
    Last Post: Dec 12th 2007, 08:40 AM

Search Tags


/mathhelpforum @mathhelpforum