document.write( "Question 26566: Two airplanes leave Dallas at the same time and fly in opposite directions. One airplane travels 80 miles per hour faster than the other. After three hours, they are 2940 miles apart. What is the rate of each airplane? \n" ); document.write( "
Algebra.Com's Answer #14436 by Paul(988)![]() ![]() ![]() You can put this solution on YOUR website! Airplane B = x \n" ); document.write( "Airplane A = x+80 \n" ); document.write( "After hours meaning 3 times them both. \n" ); document.write( "Equation: x+x+80=2940 \n" ); document.write( "After 3 hours: \n" ); document.write( "3(x+x+80)=2940 \n" ); document.write( "6x+240=2940 \n" ); document.write( "6x=2700 \n" ); document.write( "x=450 (airplane b)\r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "450+80=530 (airplane a)\r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "Hence, the speed of airplane a is 530mph and the speed of airplane b is 450mph. \n" ); document.write( "Paul. \n" ); document.write( " |