document.write( "Question 359378: Hello:) so i have a math problem that i dont quite understand! I dont have my math book so i can't look up how to do the problem. The question is:
\n" ); document.write( "Marcus and Beth leave college traveling in opposite directions on a straight road. Beth drives 13 miles faster than Marcus. After 4 hours they are 452 miles apart. Find their rates.\r
\n" ); document.write( "\n" ); document.write( " \n" ); document.write( "
Algebra.Com's Answer #256479 by ankor@dixie-net.com(22740)\"\" \"About 
You can put this solution on YOUR website!
Marcus and Beth leave college traveling in opposite directions on a straight road.
\n" ); document.write( " Beth drives 13 miles faster than Marcus.
\n" ); document.write( " After 4 hours they are 452 miles apart.
\n" ); document.write( " Find their rates.
\n" ); document.write( "Let b = B's driving rate
\n" ); document.write( "Let m = M's driving rate
\n" ); document.write( ":
\n" ); document.write( "Write a distance equation: dist = time * rate
\n" ); document.write( ":
\n" ); document.write( "M's dist + B's dist = 452
\n" ); document.write( "4m + 4b = 452
\n" ); document.write( ":
\n" ); document.write( "It says,\"Beth drives 13 miles faster than Marcus.\"; the equation for this is:
\n" ); document.write( "b = (m+13)
\n" ); document.write( ":
\n" ); document.write( "Replace b with (m+13) in the 1st equation
\n" ); document.write( "4m + 4(m+13) = 452
\n" ); document.write( "4m + 4m + 52 = 452
\n" ); document.write( "8m = 452 - 52
\n" ); document.write( "8m = 400
\n" ); document.write( "m = \"400%2F8\"
\n" ); document.write( "m = 50 mph,
\n" ); document.write( "then
\n" ); document.write( "b = 50 + 13
\n" ); document.write( "b = 63 mph
\n" ); document.write( ":
\n" ); document.write( ":
\n" ); document.write( "See if that's true
\n" ); document.write( "4(50) + 4(63) = 452
\n" ); document.write( " \n" ); document.write( "
\n" );