Results 1 to 2 of 2

Math Help - help plese ;[

  1. #1
    u.........
    Guest

    help plese ;[

    Another math problem im stuck on.


    the price of a dress is reduced by 40%. when the dress still doesnt not sell, it is reduced by 40% again.

    The reduced price after both reduction is $72.

    What was the original price?
    Follow Math Help Forum on Facebook and Google+

  2. #2
    Super Member

    Joined
    May 2006
    From
    Lexington, MA (USA)
    Posts
    11,547
    Thanks
    539
    Hello, urlostaznbro!

    The price of a dress is reduced by 40%.
    When the dress still doesnt not sell, it is reduced by 40% again.
    The reduced price after both reduction is $72.
    What was the original price?

    Let's baby-talk our way through it . . .

    Let x = original price of the dress.

    It is reduced by 40%, so the sale price is 60% of x:\;\;0.60x

    The dress doesn't sell, so it is reduced by another 40%.
    The final price is 60\% of 0.60x:\;\;(0.60)(0.60x) \:=\:0.36x
    . . which is equal to \$72.

    And there is our equation: . 0.36x\:=\:72 \quad\Rightarrow\quad x \:=\:200


    Therefore, the original price was \$200.

    ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~

    Check

    \begin{array}{ccccc}\text{Original price:} & \$200 \\<br />
\text{less 40}\%: & -80\\<br />
\text{Sale price:} & \$120\\<br />
\text{less 40}\%: & -48\\<br />
\text{Final price:} & \$72\end{array}

    Follow Math Help Forum on Facebook and Google+

Similar Math Help Forum Discussions

  1. plese help me
    Posted in the Pre-Calculus Forum
    Replies: 1
    Last Post: June 15th 2008, 12:31 PM

/mathhelpforum @mathhelpforum