Tuesday, November 11, 2014

Rachille's Proportion Problems

http://en.wikipedia.org/wiki/Lemon 

1)To make lemonade, you need 6 lemons and 8 cups of water. How many lemons would you need if you have 24 cups of water?


 Let x be the amount of lemons for 24 cups of water. 
Word ratio, ratio table, find x (cross product)
You would need 18 lemons to make lemonade with 24 cups of water.


http://commons.wikimedia.org/wiki/File:Feet_on_scale.jpg

2) The ratio of an objects weight on Earth to its weight on the moon is 6:1. the first person to walk on the moon was Neil Armstrong. He weighed 165 lb on Earth. How much did he weigh on the moon?


Let x be how much Neil weighed on the moon. 
Word ratio, ratio table, find x (cross product) 

Neil Armstrong weighed 27.5 lb on the moon.


 A Word Problem for You
*At the Copy Shoppe, 18 copies cost $1.08. At that rate, how much will 40 copies cost?

3 comments :

  1. Fili Rm 9-02November 12, 2014 at 4:34 PM

    This comment has been removed by the author.

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  2. Fili Rm 9-02November 12, 2014 at 4:47 PM

    For the word problem given to us, I got an answer of $2.40 because:
    Let x be the $ for 40 copies
    Steps: Word Ratio, Ratio Table, Find x
    Model:

    Copies l $
    18 $1.08
    40 x

    Work:

    1.08 x 40 = 18(x)
    43.2 = 18x
    43.2/18 = 18x/18
    2.40 = x

    So it cost $2.40 for 40 copies.

    Also, very neat pictures as well as the Model and Work

    ReplyDelete
  3. UnknownNovember 12, 2014 at 6:15 PM

    Answer for your question:
    ~For 40 copies it would cost you $2.40
    (I got the answer by doing cross multiplication)

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