document.write( "Question 974549: Imogene's car traveled 420 mi averaging a certain speed. If the car had gone 10 mph faster, the trip would have taken 1 hour less. Find the average speed. \n" ); document.write( "

Algebra.Com's Answer #596457 by josgarithmetic(39618) $\"\"$ $\"About$

You can put this solution on YOUR website!
generalizing the description with variables,
\n" ); document.write( "Imogene's car traveled d miles averaging a certain speed. If the car had gone k mph faster, the trip would have taken h hour less. Find the average speed, r.\r
\n" ); document.write( "
\n" ); document.write( "
\n" ); document.write( "\n" ); document.write( "_______________________rate______________time______________distance
\n" ); document.write( "Certain________________r_________________t_________________d
\n" ); document.write( "IfFaster_______________r+k_______________t-h_______________d\r
\n" ); document.write( "
\n" ); document.write( "\n" ); document.write( "KNOWN
\n" ); document.write( "h, k, d\r
\n" ); document.write( "
\n" ); document.write( "\n" ); document.write( "UNKNOWN
\n" ); document.write( "r, t\r
\n" ); document.write( "
\n" ); document.write( "\n" ); document.write( "BASIC RELATIONSHIP, EQUATION
\n" ); document.write( "RT=D relating rate, time, distance\r
\n" ); document.write( "
\n" ); document.write( "\n" ); document.write( "SYSTEM OF EQUATIONS
\n" ); document.write( " $\"system%28rt=d%2C%28r%2Bk%29%28t-h%29=d%29\"$ \r
\n" ); document.write( "
\n" ); document.write( "\n" ); document.write( "Solve the system for r and t. \n" ); document.write( "

\n" );