anonymous
  • anonymous
How much water must be added to 12 L of a 40% solution of alcohol to obtain a 30% solution?
Mathematics
jamiebookeater
  • jamiebookeater
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anonymous
  • anonymous
0.4(12)=4.8L of alcohol now This means 7.2 L of water. (7.2+x)=0.7(12+x) 7.2+x=8.4+0.7x 0.3x=1.2 x=4 x is the amount of water added.
anonymous
  • anonymous
Fool can i get your help
anonymous
  • anonymous
Sure tinkerbell, how can I help you?

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anonymous
  • anonymous
im trying to check 20 math questions and see if i have the right answers
anonymous
  • anonymous
20 is a big number :(
anonymous
  • anonymous
i know but it will go quick i promise
lalaly
  • lalaly
lol fool has time:P
anonymous
  • anonymous
i have it done im just checking to see if i have them right
anonymous
  • anonymous
lol, lala and diya would certainly help you :P
anonymous
  • anonymous
okay sure tinker post them.
lalaly
  • lalaly
hehehe
anonymous
  • anonymous
post them here or do a new post
anonymous
  • anonymous
ok

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