SOLUTION: A cookie recipe requires 4 cups of flour to make 5 dozen cookies. If Amy needs to make 15 dozen cookies, how many cups of flour will she need?

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Question 563021: A cookie recipe requires 4 cups of flour to make 5 dozen cookies. If Amy needs to make 15 dozen cookies, how many cups of flour will she need?
Answer by josmiceli(19441) About Me  (Show Source):
You can put this solution on YOUR website!
The ratio of flour to cookies is +4%2F5+ cups/dozen
Let +c+ = cups of flour needed
+4%2F5+=+c%2F15+
Multiply both sides by +15+
+12+=+c+
Amy needs 12 cups of flour