A certain shade of pink is created by adding 3 cups of white paint to 2 cups of red paint. If 7 cups of white paint is used, how many cups of red paint is needed?

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Let's apply rule of 3....

   WP              RP

    3    --------    2

    7    --------    X

3 · X = 7 · 2

3X = 14

X = 14/3

remember that

14/3 = 4 2/3

So, 7 WP = 4 2/3 RP

................................................

D  | d      

R   Q

so

D/d = Q R/d

You need to divide 210 square inches by 35 inches and that’s going to give you 6 inches and that’s the length of the hypothenuse of the right triangle i hope that this you : )

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