Solve the problem.
-Anne and Nancy use a metal alloy that is 16% copper to make jewelry. How many ounces of an alloy that is 10% copper must be mixed with an alloy that is 20% copper to form 55 ounces of the desired alloy?
A) 22 ounces
B) 33 ounces
C) 38 ounces
D) 24 ounces

Question

Quizplus · Accepted Answer

To find the amount of 10% copper alloy needed, let x be the ounces of 10% alloy. Then, 55 - x will be the ounces of 20% alloy. The equation is 0.10x + 0.20(55 - x) = 0.16(55). Solving this gives x = 22 ounces.

Solve the Problem. -Anne and Nancy Use a Metal Alloy That Is 16