document.write( "Question 272376: a motor boat can travel 15 miles per hour downstream and 9 miles upstream per hour on a certin river. Fint the rate of the current and the rate at which the boat can travel on still water. \n" ); document.write( "
Algebra.Com's Answer #199266 by scott8148(6628)![]() ![]() You can put this solution on YOUR website! b + c = 15\r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "b - c = 9\r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "adding equations ___ 2b = 24 ___ b = 12\r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "substituting ___ 12 + c = 15 ___ c = 3 \n" ); document.write( " |