document.write( "Question 717471: Two planes start at the same time from points that are 1550 kilometers apart. How long will it take the two planes to meet if plane A flies at 220 kilometers an hour and plane B flies at 280 kilometers an hour? \n" ); document.write( "
Algebra.Com's Answer #440470 by jndarrell(58)\"\" \"About 
You can put this solution on YOUR website!
Create your D=RT box chart and fill in appropriately with the following data derived from your problem:\r
\n" ); document.write( "\n" ); document.write( "Plane A
\n" ); document.write( "Rate: 220
\n" ); document.write( "Time: x\r
\n" ); document.write( "\n" ); document.write( "Plane B
\n" ); document.write( "Rate: 280
\n" ); document.write( "Time: x\r
\n" ); document.write( "\n" ); document.write( "Time is x b/c that is what we are looking for. Always remember, when a problem provides you with a total distance, whether it be distance between two objects or total distance they are to travel...a total is a total. You will take the sum of the two objects R*T and set them equal to the total distance. See below:\r
\n" ); document.write( "\n" ); document.write( "220x + 280x = 1550
\n" ); document.write( "500x = 1550
\n" ); document.write( "Divide both sides by 500 to get your x alone
\n" ); document.write( "x= 3.1 hours\r
\n" ); document.write( "\n" ); document.write( "To check, take your D=RT formula and plug it into the equation created
\n" ); document.write( "220(3.1) + 280(3.1) = 1550
\n" ); document.write( "682 + 868
\n" ); document.write( "=1550 CHECK CORRECT!!!
\n" ); document.write( "Don't forget the units (hours) when providing your solution.\r
\n" ); document.write( "\n" ); document.write( ":)\r
\n" ); document.write( "
\n" ); document.write( "\n" ); document.write( " \n" ); document.write( "
\n" );