Results 1 to 4 of 4

Math Help - HELP~ i dun understand!!!

  1. #1
    Junior Member
    Joined
    Jan 2006
    Posts
    38

    HELP~ i dun understand!!!

    these question i dun understand.. and i dunno how to do.. can some 1 help plz.. question.. 2,3,4,5
    Attached Thumbnails Attached Thumbnails HELP~ i dun understand!!!-scan0002.jpg  
    Follow Math Help Forum on Facebook and Google+

  2. #2
    Grand Panjandrum
    Joined
    Nov 2005
    From
    someplace
    Posts
    14,972
    Thanks
    4
    Quote Originally Posted by xiaoz
    these question i dun understand.. and i dunno how to do.. can some 1 help plz.. question.. 2,3,4,5
    2a 530 \div 0.025=\frac{530}{0.025}

    multiply top and bottom by 1000:

    530 \div 0.025=\frac{1000\times 530}{1000\times 0.025}=\frac{530000}{25}

    2b The cost of dinner is the price of the food plus a 4% service charge.

    A diner paid $93.60, what was the price of the food?

    Let \$x be the price of the food, then the diner pays:

    x+0.04x=1.04x=93.5,

    so:

    x=\frac{93.5}{1.04} dollars.

    RonL
    Follow Math Help Forum on Facebook and Google+

  3. #3
    Global Moderator

    Joined
    Nov 2005
    From
    New York City
    Posts
    10,616
    Thanks
    9
    3a.
    The next number of the sequence is found by adding the previous ones. This is called fibonacci sequence.
    Follow Math Help Forum on Facebook and Google+

  4. #4
    Global Moderator

    Joined
    Nov 2005
    From
    New York City
    Posts
    10,616
    Thanks
    9
    6a,
    5<6x-13<7
    Add 13,
    18<6x<20
    Divide by six,
    3<x<3.333

    6b,
    You have,
    \frac{7}{11}<x<\frac{8}{11}
    For example if,
    x=\frac{7.5}{11}
    But express it as a fraction,
    x=\frac{\frac{15}{2}}{11}=\frac{15}{22}

    6c,
    You have,
    x^{2y}=5
    then cube both sides,
    x^{6y}=125
    Mutiply by 2,
    2x^{6y}=250
    subtract by four,
    2x^{6y}-4=246
    Follow Math Help Forum on Facebook and Google+

Similar Math Help Forum Discussions

  1. Replies: 5
    Last Post: May 30th 2010, 02:36 PM
  2. Replies: 0
    Last Post: February 27th 2010, 11:57 AM
  3. Don't really understand
    Posted in the Math Topics Forum
    Replies: 3
    Last Post: September 23rd 2008, 07:34 PM
  4. P&C qns: Please help me understand
    Posted in the Statistics Forum
    Replies: 3
    Last Post: February 20th 2008, 03:31 AM
  5. Help me understand this please!!
    Posted in the Algebra Forum
    Replies: 2
    Last Post: September 30th 2007, 11:41 AM

Search Tags


/mathhelpforum @mathhelpforum