document.write( "Question 377563: Two cars start from the same point and travel in opposite directions with speeds of 45 and 60 miles per hour respectively. In how many hours will they be 490 miles apart? -Thanks a lot! \n" ); document.write( "
Algebra.Com's Answer #268278 by ewatrrr(24785)\"\" \"About 
You can put this solution on YOUR website!

\n" );
document.write( "Hi
\n" );
document.write( "D = r*t OR D/r = t  BOTH cars will be traveling the same amountof time
\n" );
document.write( "Let x represent car's distance traveling at 45mph, 
\n" );
document.write( "and (490-x) the distance traveled by the car going 60mph
\n" );
document.write( "\"x%2F45+=+%28490-x%29%2F60\"
\n" );
document.write( "Cross multiply to solve
\n" );
document.write( "60x = 45(490-x)
\n" );
document.write( "60x = 45*490 - 45x
\n" );
document.write( "115x = 45*490
\n" );
document.write( "x = 45*490/105
\n" );
document.write( "x = 210mi, car's distance traveling at 45mph
\n" );
document.write( "210mi/45mph = 4 2/3 hours or 4hr and 40 min. 
\n" );
document.write( "CHECKING OUR ANSWER 
\n" );
document.write( " 210MI + 60mph*14/3hr = 210mi + 280mi = 490mi \n" );
document.write( "
\n" );