SOLUTION: A dairy farmer wants to mix a 85% protein supplement and a standard 10% protein ration to make 1000 pounds of a high-grade 70% protein ration. How many pounds of each should he use

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Question 423009: A dairy farmer wants to mix a 85% protein supplement and a standard 10% protein ration to make 1000 pounds of a high-grade 70% protein ration. How many pounds of each should he use?
Answer by jorel1380(3719) About Me  (Show Source):
You can put this solution on YOUR website!
1000x.7=700
p+q=1000
.85p+.1q=700
8.5p+q=7000
7.5p=6000
p=800
q=200
The dairy farmer needs 800 lbs. of 85% protein and 200 lbs. of 10% protein..