document.write( "Question 370512: Liz commutes 30 mi. to her job each day. She finds that if she drives 10 mi/h faster it takes her 6 minutes less to get to work. Find her new speed. \n" ); document.write( "
Algebra.Com's Answer #264146 by mananth(16946)![]() ![]() You can put this solution on YOUR website! 1/2 hour to work place every day \n" ); document.write( "speed = 30 mph \n" ); document.write( "... \n" ); document.write( "if she increases her speed by 10 mph her speed will be 30+10 = 40 mph. \n" ); document.write( "... \n" ); document.write( "let distance to work place be x \n" ); document.write( ".. \n" ); document.write( "time taken with present speed - time taken with increased speed = 1/10 hours \n" ); document.write( ".. \n" ); document.write( "t= d/r \n" ); document.write( ".. \n" ); document.write( "x/30 - x/(40)= 1/6 \n" ); document.write( "LCD = 120 \n" ); document.write( "(4x-3x)/120 = 1/6 \n" ); document.write( "x/120 =1/6 \n" ); document.write( "6x=120 \n" ); document.write( "/6 \n" ); document.write( "x= 20 miles distance to work \n" ); document.write( ".. \n" ); document.write( "m.ananth@hotmail.ca \n" ); document.write( " |