SOLUTION: If one blend of coffee sells for $9.00 per pound and another blend sells for $8.00 per pound how many of each type should be used to maake a 20 pond blend that sells for $8.40 per
Question 522918: If one blend of coffee sells for $9.00 per pound and another blend sells for $8.00 per pound how many of each type should be used to maake a 20 pond blend that sells for $8.40 per pound? Answer by josmiceli(19441) (Show Source):
You can put this solution on YOUR website! Let = pounds of $9 coffee needed
Let = pounds of $8 coffee needed
given:
(1)
(2)
----------------------
(2)
(2)
(2)
Multiply both sides of (1) by and
subtract (1) from (2)
(2)
(1)
and, since
(1)
(1)
(1)
8 pounds of $9 coffee are needed
12 pounds of $8 coffee are needed
check:
(2)
(2)
(2)
(2)
OK
