A shop specializes in preparing blends of gourmet coffees. From Colombian, Costa Rican, and Kenyan coffees, the owner wishes to prepare 2-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.
A) 0.3 lb Colombian , 0.1 lb Costa Rican , 1.6 lb Kenyan
B) 1.05 lb Colombian , 0.35 lb Costa Rican , 0.6 lb Kenyan
C) 0.6 lb Colombian , 0.2 lb Costa Rican , 1.2 lb Kenyan
D) 0.75 lb Colombian , 0.25 lb Costa Rican , 2 lb Kenyan
E) 0.75 lb Colombian , 0.25 lb Costa Rican , 1 lb Kenyan
Correct Answer:
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Q77: Use matrices to solve the system.
Q78: Solve the system Q79: Find the determinant of the matrix. Q80: Find the inverse of the matrix if Q81: Find the determinant of the matrix.
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