document.write( "Question 735314: Susie runs a mile every day for a week (7DAYS). Her average speed is 8 minutes. She runs another day, Now her average speed is 7.8 minutes. How fast did she run on the 8th day? \n" ); document.write( "
Algebra.Com's Answer #449396 by ankor@dixie-net.com(22740)![]() ![]() You can put this solution on YOUR website! When you refer to speed, it's mph, km/h, miles per minute etc. not minutes \n" ); document.write( ": \n" ); document.write( "Perhaps you mean: \n" ); document.write( "\"Susie runs a mile every day for a week (7DAYS). \n" ); document.write( " Her average time is 8 minutes. \n" ); document.write( " She runs another day, Now her average time is 7.8 minutes. \n" ); document.write( " What as her time on the 8th day? \n" ); document.write( ": \n" ); document.write( "Let m = time in minute to run a mile on the 8th day \n" ); document.write( ": \n" ); document.write( " \n" ); document.write( "56 + m = 8(7.8) \n" ); document.write( "m = 62.4 - 56 \n" ); document.write( "m = 6.4 min to run a mile on the 8th day \n" ); document.write( " |