SOLUTION: I'm taking on online class and I can't figure this out. please help me.
how much of an alloy that is 30% copper should be mixed with 500 ounces of an alloy that is 70% copper in
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how much of an alloy that is 30% copper should be mixed with 500 ounces of an alloy that is 70% copper in
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Question 345140: I'm taking on online class and I can't figure this out. please help me.
how much of an alloy that is 30% copper should be mixed with 500 ounces of an alloy that is 70% copper in order to get an alloy that is 40% copper? Answer by ankor@dixie-net.com(22740) (Show Source):
You can put this solution on YOUR website! How much of an alloy that is 30% copper should be mixed with 500 ounces of an alloy that is 70% copper in order to get an alloy that is 40% copper?
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Let x = amt of 30% copper alloy
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Write a decimal equiv equation
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.30x + .70(500) = .40(x + 500)
:
.30x + 350 = .40x + 200
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350 - 200 = .40x - .30x
:
150 = .10x
x =
x = 1500 oz of 30% copper required
:
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Check solution in original equation
.30(1500) + .70(500) = .40(1500 + 500)
450 + 350 = .40(2000)
800 = 800, confirms our solution of x = 1500
