document.write( "Question 609620: Please help me solve this, I don't understand
\n" ); document.write( "A sales executive traveled 72 miles by car and then an additional 840 miles by plane. The rate of the plane was five times faster than the rate of the car. The total time of the trip was 5 hours. find the rate of the plane
\n" ); document.write( "what I tried was setting it up like this\r
\n" ); document.write( "\n" ); document.write( "72/x +840/5x=912\r
\n" ); document.write( "
\n" ); document.write( "\n" ); document.write( "I put 912 because I just added the miles given, please help
\n" ); document.write( "

Algebra.Com's Answer #383835 by edjones(8007)\"\" \"About 
You can put this solution on YOUR website!
r=rate of car, 5r=rate of plane
\n" ); document.write( "t=d/r
\n" ); document.write( "72/r + 840/5r = 5
\n" ); document.write( "360+840=25r multiply each side by 5r.
\n" ); document.write( "25r=1200
\n" ); document.write( "r=48 mph
\n" ); document.write( "5r=240 mph
\n" ); document.write( ".
\n" ); document.write( "Ed
\n" ); document.write( "
\n" );