
Yefim S. answered 06/03/21
Math Tutor with Experience
x mL pure alcohol: Then we have equation: (270 + x)·0.30 = 270·0.70; 0.30x = 270·0.40; x = 360 mL of pure alcohol
Halima O.
asked 06/03/21You need a 70% alcohol solution. On hand, you have a 270 mL of a 30% alcohol mixture. How much pure alcohol will you need to add to obtain the desired solution?
You will need
________- mL of pure alcohol
to obtain
_______-mL of the desired 70% solution.
Yefim S. answered 06/03/21
Math Tutor with Experience
x mL pure alcohol: Then we have equation: (270 + x)·0.30 = 270·0.70; 0.30x = 270·0.40; x = 360 mL of pure alcohol
Mark M. answered 06/03/21
Mathematics Teacher - NCLB Highly Qualified
(0.30)(230) + 1.00x = 0.70(230 + x)
Can you solve for x and answer
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