A chemical company makes two brands of antifreeze. The first brand is 20% pure antifreeze, and the second brand is 45% pure anti
freeze. In order to obtain 130 gallons of a mixture that contains 30% pure antifreeze, how many gallons of each brand of antifreeze must be used 130 gallons of a mixture that contains 30% pure antifreeze, how many gallons of each brand of antifreeze must be use
27 miles per gallon. because 153 miles minus 45 miles is 108 miles. 15 gallons of gas minus 11 gallons of gas is 4 gallons of gas. 108 miles divided by 4 gallons is 27 mpg :)
