SOLUTION: A printer has ink that is 13% cobalt blue color and ink that is 17% cobalt blue color. How many ounces of each ink are needed to make 2 gallons (256 ounces) of ink that is 15% coba
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Question 760543: A printer has ink that is 13% cobalt blue color and ink that is 17% cobalt blue color. How many ounces of each ink are needed to make 2 gallons (256 ounces) of ink that is 15% cobalt blue color
Answer by josmiceli(19441) (Show Source): You can put this solution on YOUR website!
Let = ounces of 13% ink needed
Let = ounces of 17% ink needed
= ounces of cobalt blue color in 13% ink
= ounces of cobalt blue color in 17% ink
---------------------
(1)
(2)
------------------------------
(2)
(2)
(2)
Multiply both sides of (1) by
and subtract (1) from (2)
(2)
(1)
and, since
(1)
(1)
(1)
128 ounces of 13% ink are needed
128 ounces of 17% ink are needed
check:
(2)
(2)
(2)
(2)
OK
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