A certain shade of pink is created by adding 3 cups of Red paint to 7 cups of white paint. How many cups of red paint should be added to 1 cup of white paint?

three sevenths of a cup; of a cup; 0.43 of a cup

Step-by-step explanation:

The ratio of red paint to white paint is 3:7,

You could write this as a fraction too, 3/7.

If there is 1 cup of white paint then that means 3/7 = ?/1

7 divided by 1 equals 7, what you do to the bottom you must do to the top. 3 divided by 7 equals 3/7 of a cup, or 0.43 of a cup.

=

7 ÷ ? = 1

7 ÷ 7 = 1

3 ÷ 7 = or 0.43

=

set each factor equal to 0

4x-3 = 0

2x-1 = 0

solve for x.

4x-3=0

4x=3

x= 3/4

solve for x. 

2x-1= 0

2x= 1

x= 1/2

your answer should be 1/2 is less than or equal to x and 3/4 is greater than or equal to x