SOLUTION: Debra's Coffee Shop makes a blend that is a mixture of two types of coffee. Type A coffee costs Debra
$4.15
per pound, and type B coffee costs
$5.70
per pound. This month,
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Question 1103656: Debra's Coffee Shop makes a blend that is a mixture of two types of coffee. Type A coffee costs Debra
$4.15
per pound, and type B coffee costs
$5.70
per pound. This month, Debra made
144
pounds of the blend, for a total cost of
$734.00
. How many pounds of type B coffee did she use?
Answer by josmiceli(19441) (Show Source): You can put this solution on YOUR website!
Let = pounds of type A needed
Let = pounds of type B needed
---------------------------------------
(1)
(2)
--------------------------------
(2)
Multiply both sides of (1) by and
and subtract (1) from (2)
--------------------------------
(2)
(1)
--------------------------------
and
(1)
(1)
(1)
-----------------------
she needs 88 pounds of type B coffee
-----------------------------------
check:
(2)
(2)
(2)
(2)
OK
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