Physics
posted by Amanda .
Please help!
suppose you have some 20 degrees celsius water and some boiling water. How much of each would you use to make 4 kilograms of water at 45 degrees celsuis?

let M be the cool water, m be the boiling water.
Mc(4520)+mc((45100)=0
where M+m=4
M(25)+(4M)(55)=0 solve
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