Question 1154197
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The quickest way to the answer to a mixture problem like this involving two ingredients:<br>
75% is three-fourths of the way from 45% to 85%.
Therefore, three-fourths of the mixture is the higher percentage ingredient.<br>
ANSWER: 3/4 of 40 gallons, or 30 gallons, of 85% antifreeze, the other 10 gallons of 45% antifreeze.<br>