SOLUTION: a merchant has coffee worth $20a lb that she wishes to mix with 60 lbs of coffee worth $70 a lb to get a mixture that can be sold for $30 a lb. How many of the ponds of the $20 cof
Question 356344: a merchant has coffee worth $20a lb that she wishes to mix with 60 lbs of coffee worth $70 a lb to get a mixture that can be sold for $30 a lb. How many of the ponds of the $20 coffee should be used? Answer by scott8148(6628) (Show Source):