document.write( "Question 858150: A boat can go 72 miles downstream in 3 hours, and can make the return trip in 4 hours. Find the speed of the boat in still water. \n" ); document.write( "
Algebra.Com's Answer #517293 by tommyt3rd(5050)![]() ![]() You can put this solution on YOUR website! up: (s+c)3=72, \n" ); document.write( "down: (s-c)4=72\r \n" ); document.write( "\n" ); document.write( "adding...\r \n" ); document.write( "\n" ); document.write( "2s=72(1/3+1/4)\r \n" ); document.write( "\n" ); document.write( "then...\r \n" ); document.write( "\n" ); document.write( "s=21\r \n" ); document.write( "\n" ); document.write( "boat speed: 21mph \n" ); document.write( " |