Results 1 to 3 of 3

Math Help - Application of Quadratics help

  1. #1
    Junior Member 22upon7's Avatar
    Joined
    Nov 2008
    Posts
    60

    Application of Quadratic Graphs

    The path of a javelin thrown by Marita is given by the formula h=-\frac{1}{16}(d-10)^2+9 where h meters is the height of the javelin above ground and d meters is the horizontal distance travelled.


    1. What are the possible values of d?
    the book says the answer is 0=<d=<22,my question is what is the process of getting those values?
    Last edited by 22upon7; November 15th 2008 at 09:06 PM.
    Follow Math Help Forum on Facebook and Google+

  2. #2
    Junior Member
    Joined
    Oct 2008
    Posts
    42
    Quote Originally Posted by 22upon7 View Post
    The path of a javelin thrown by Marita is given by the formula h=-\frac{1}{16}(d-10)^2+9 where h meters is the height of the javelin above ground and d meters is the horizontal distance travelled.


    1. What are the possible values of d?
    the book says the answer is 0=<d=<22,my question is what is the process of getting those values?

    just graph the function and u ll see...u know that the javelin is thrown at some height above ground where x=0, that is why u ll start with zero...then in order to find where the javelin lands, just put zero for y and solve for x....u ll get 22....therefore the domain would be 0=<d=<22
    Follow Math Help Forum on Facebook and Google+

  3. #3
    Junior Member 22upon7's Avatar
    Joined
    Nov 2008
    Posts
    60
    If you solve it you get -1/16 (d-7) (d-13)

    D=7 or 13

    Then do you have to add them both together to get 20?
    Follow Math Help Forum on Facebook and Google+

Similar Math Help Forum Discussions

  1. quadratics help
    Posted in the Pre-Calculus Forum
    Replies: 4
    Last Post: February 24th 2009, 04:38 PM
  2. Quadratics
    Posted in the Algebra Forum
    Replies: 6
    Last Post: December 8th 2008, 02:39 AM
  3. Replies: 1
    Last Post: October 9th 2008, 04:17 AM
  4. Quadratics Help
    Posted in the Algebra Forum
    Replies: 4
    Last Post: July 17th 2007, 05:27 AM

Search Tags


/mathhelpforum @mathhelpforum