document.write( "Question 685046: a biker travels a rate of 12 mphwhen there is no wind. Against the wind, he bikes 8 miles in the same time that it takes to bike 14 miles with the wind. what is the speed of the wind? \n" ); document.write( "
Algebra.Com's Answer #424313 by mananth(16946)![]() ![]() You can put this solution on YOUR website! biker speed = 12 mph \n" ); document.write( "windspeed = x mph \n" ); document.write( " \n" ); document.write( "speed against wind 12 - x \n" ); document.write( "speed with wind 12 + x \n" ); document.write( " \n" ); document.write( "Distance against wind 8 miles \n" ); document.write( "Distance with wind 14 miles \n" ); document.write( " \n" ); document.write( "t=d/r time against = time with wind - \n" ); document.write( "8/(12-x )=14/(12+x)8 \n" ); document.write( "8( 12 + x )= 14 (12 -x ) \n" ); document.write( "96 + 8 x = 168 - -14 x \n" ); document.write( "14 x 8 x 168 + -96 \n" ); document.write( "22 x = 72 \n" ); document.write( "/ 22 check \n" ); document.write( "x = 3.27 mph wind speed \n" ); document.write( " |