document.write( "Question 1071261: Write a proportion and solve. A 12 ounce serving of Mountain Dew contains 55mg of caffeine. How much is in an 18 ounce serving? \n" ); document.write( "
Algebra.Com's Answer #686215 by Boreal(15235)![]() ![]() You can put this solution on YOUR website! 12 oz/55mg=18 oz/x mg \n" ); document.write( "cross-multiply \n" ); document.write( "12x=990 \n" ); document.write( "x=82.5 mg \n" ); document.write( "----------- \n" ); document.write( "Recognize that 18 is half again 12 \n" ); document.write( "half again of 55 is 27.5, which added to 55=82.5 \n" ); document.write( " |