Question

A metallurgist is experimenting with two copper alloys, one containing 60 percent copper and one containing 90 percent copper. How much of each alloy must he mix to produce 8 pounds of a new alloy containing 80 percent copper?

3 pounds of 60 percent copper alloy and 5 pounds of 90 percent copper alloy

3.33 pounds of 60 percent copper alloy and 4.66 pounds of 90 percent copper alloy

2 pounds of 60 percent copper alloy and 6 pounds of 90 percent copper alloy

2.67 pounds of 60 percent copper alloy and 5.33 pounds of 90 percent copper alloy

Answer 1

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Answer 2

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Answer 3

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Answer 4

This is linear equations algebraic