Physics
posted by Amanda on .
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