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

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

mathteacher1729 · Answer

Hey I have a meeting now but you might find this doc about mixing problems helpful. http://www.wallace.ccfaculty.org/book/4.6%20%20Mixture.pdf I'll try to get back before the end of the day. Good luck!