Question

James needs to mix a 10% alcohol solution with a 60% alcohol solution to create 100 millileters of a 20% solution. How many millileters of each solution must James use? A) Write an equation using the information as it is given above that can be used to solve this problem. Use as your variable to represent the quantity of 10% alcohol solution. Equation: B) Answer: James must mix HOW MANY millileters of 10% solution and HOW MANY millileters of 60% solution?

Answer 1

hav sum at 10% & 60%, want 100 cc av 20%... 1: 0.1x +0.6y=20% av 100=20... 2: x+y=100, so y=100-x.... 0.1x +0.6*(100-x) =20... 0.1x -0.6x +60=20... -0.5x=-40... x=80 cc's av the 10% stuf... so yu need 20 cc's av the 60% stuf