Solve the Problem Using Matrices $19.69 \%$ Copper to Make Jewelry $15 \%$

question 227

Multiple Choice

Solve the problem using matrices.
-Anne and Nancy use a metal alloy that is $19.69 \%$ copper to make jewelry. How many ounces of an alloy that is $15 \%$ copper must be mixed with an alloy that is $22 \%$ copper to form 100 ounces of the desired alloy?

• A) \(72 \mathrm { oz }\)
• B) \(67 \mathrm { oz }\)
• C) \(35 \mathrm { oz }\)
• D) \(33 \mathrm { oz }\)

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