document.write( "Question 645232: For the first 5 miles of a 10-mile race, Joshua's rate was 10 mph. for the last 5 miles, his rte slowed to 8 mph. How long it take for Joshua to complete the race? \n" ); document.write( "
Algebra.Com's Answer #405398 by Alan3354(69443)![]() ![]() You can put this solution on YOUR website! For the first 5 miles of a 10-mile race, Joshua's rate was 10 mph. for the last 5 miles, his rte slowed to 8 mph. How long it take for Joshua to complete the race? \n" ); document.write( "------------ \n" ); document.write( "His avg speed for the 10 miles = 2*10*8/(10+8) = 80/9 mi/hr \n" ); document.write( "d = r*t \n" ); document.write( "t = d/r = 10/(80/9) = 9/8 \n" ); document.write( "t = 1.125 hours \n" ); document.write( " |