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marysya [2.9K]
3 years ago
9

How much of an alloy that is 30% copper should be mixed with 600 ounces of an alloy that is 60% copper in order to get an alloy

fratis
40 copper?
ounces
Mathematics
1 answer:
antoniya [11.8K]3 years ago
7 0

9514 1404 393

Answer:

 1200 ounces

Step-by-step explanation:

Let x represent the weight of 30% copper that needs to be added to the mix. Then the total weight will be (600+x) ounces, and the amount of copper in the mix is ...

  0.30x +0.60(600) = 0.40(600 +x)

  0.3x +360 = 240 +0.4x . . . . . simplify

  120 = 0.1x . . . . . . . . . . . . . subtract 0.3x+240

  1200 = x . . . . . . . . . . multiply by 10

1200 ounces of 30% copper should be added to the mix.

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