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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?

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 class=

Respuesta :

Answer:

10 1/2

Step-by-step explanation:

white : red

2 : 3

1 : 3/ 2

7 : 3/2 ×7

7 : 10.5

7 : 10 1/2

option 3 is the answer

tomson1975

Greetings from Brasil...

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

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