document.write( "Question 340285: two planes which are 1860 miles apart travel toward each other. their speeds difer by 70mph. if they pass each other in 3 hours what are their speeds? \n" ); document.write( "
| Algebra.Com's Answer #243809 by nerdybill(7384)     You can put this solution on YOUR website! two planes which are 1860 miles apart travel toward each other. their speeds difer by 70mph. if they pass each other in 3 hours what are their speeds? \n" ); document.write( ". \n" ); document.write( "Apply the distance forumla: d=rt \n" ); document.write( ". \n" ); document.write( "Let x = faster plane \n" ); document.write( "then \n" ); document.write( "x-70 = slower plane \n" ); document.write( ". \n" ); document.write( "3x + 3(x-70) = 1860 \n" ); document.write( "Dividing both sides by 3: \n" ); document.write( "x + (x-70) = 620 \n" ); document.write( "2x-70 = 620 \n" ); document.write( "2x = 690 \n" ); document.write( "x = 345 mph (faster plane) \n" ); document.write( ". \n" ); document.write( "Slower plane: \n" ); document.write( "x-70 = 345-70 = 275 mph \n" ); document.write( " \n" ); document.write( " \n" ); document.write( " |