Lbs Costa Rican
Posted on Friday, July 8th, 2011 at 7:19 pm
sys of equations: lbs of coffee?
Forgot how to do these… step by step please. 
A shop specializes in preparing blends of gourmet coffees. From Colombian, Costa Rican, and Kenyan coffees, the owner wishes to prepare 3-pounds bags that will sell for $8.50. The cost per pound of these coffees is $10, $6, and $8, respectively. The amount of Colombian is to be three times the amount of Costa Rican. Find the amount of each type of coffee in the blend.
assume you mean 8.50 /pound
4r+k=3
30r+6r+8k=25.5
36r+24-32r=25.5
4r=1.5
r=0.375lb=costa rican
colo=1.125lb
k=1.5
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