document.write( "Question 331676: While on a treadmill, Marlena walked 2 miles an hour for one-third of the time and 4 miles an hour for two-thirds of the time. She walked a total of 2.5 miles. What amount of time, in hours, did Marlena walk on the treadmill? \n" ); document.write( "
Algebra.Com's Answer #237768 by mananth(16946)![]() ![]() You can put this solution on YOUR website! let her walk for x hours on the tread mill \n" ); document.write( "x/3 hours at 2mph \n" ); document.write( ".. \n" ); document.write( "2x/3 hours at 4 mph \n" ); document.write( "Distance = speed * time \n" ); document.write( ".. \n" ); document.write( "2x/3 + 8x/3= 5/2 \n" ); document.write( "2x/3 +2x=5/2 \n" ); document.write( "10x / 3= 5/2 \n" ); document.write( "20x = 15 \n" ); document.write( "x=15/20 \n" ); document.write( "x=3/4 hour \n" ); document.write( " |