SOLUTION: A doctor's prescription calls for a daily intake containing 50 mg of vitamin C and 10 mg of vitamin D. Your pharmacy stocks two compounds that can be used: one contains 80% vitamin

Question 1073018: A doctor's prescription calls for a daily intake containing 50 mg of vitamin C and 10 mg of vitamin D. Your pharmacy stocks two compounds that can be used: one contains 80% vitamin D, the other 40% vitamin C and 20% vitamin D. How many milligrams of each compound should be mixed to fill the prescription?
Answer by josgarithmetic(39618) (Show Source): You can put this solution on YOUR website!

ONE DAY'S WORTH OF PRESCRIPTION
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             mgs of compound       Vitamin C        Vitamin D

The One           x                 0                0.8x

The Other         y                0.4y              0.2y

Totals                             50                 10

Solve this system for x and y.
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