document.write( "Question 963225: 2. Joe drove at the speed of 45 miles per hour for a certain distance. He then drove at the speed of 55 miles per hour for the same distance. What is the average speed for the whole trip?  \n" ); document.write( "
Algebra.Com's Answer #588453 by Alan3354(69443)\"\" \"About 
You can put this solution on YOUR website!
2*45*55/(45+55)
\n" ); document.write( "= 49.5 mi/hr
\n" ); document.write( "
\n" );