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)\"\" \"About 
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( "\"%287%288%29%2Bm%29%2F8\" = 7.8
\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( "
\n" );