One batch of pink paint uses 2 cups of red paint and 7 cups of white paint. Mai made a large batch of pink paint using 21 cups of white paint. How many cups of red paint did she use?

3

Step-by-step explanation:

because 1 pink batch uses 2 cups of red paint =1+2 =3

and 7 cups of whit paints

and we know that she used a large batch of pink paint using 21 cups of white paints .Therefore she used 3 cups of red paints.

Because =7×3=21

answer: the correct one is a

step-by-step explanation:

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