Let x be your first alloy
2/5x+7/10(30-x)=1/2(30)
4x+210-7x=150
3x=60
x=20
So, you need 20 lbs of the first alloy, and 10 parts of the second to make 30 lbs of half iron and half silver alloy!
Answer:
He ran 11,420 miles on the weekend.
Step-by-step explanation:
It's simple: add 4610 and 6810 to get 11,420
hope this helped!
Answer:
.60
Step-by-step explanation:
The way you do this is by getting the denominator to 100
Take 20 and multiply it by 5 and then take 12 and do the same.
That gives you 60/100 which is the same as .60
Hope this helped ! !
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