document.write( "Question 1148884: Julie recently drove to visit her parents who live 200 miles away. On her way there her average speed was 9 miles per hour faster than on her way home (she ran into some bad weather). If Julie spent a total of 10 hours driving, find the two rates. \n" ); document.write( "

Algebra.Com's Answer #770209 by ikleyn(52879) $\"\"$ $\"About$

You can put this solution on YOUR website!
.
\n" ); document.write( "

\r\n" );
document.write( "\r\n" );
document.write( "Let the slower average speed be x miles per hour.\r\n" );
document.write( "\r\n" );
document.write( "\r\n" );
document.write( "Then the faster average speed is  (x+9) miles per hour.\r\n" );
document.write( "\r\n" );
document.write( "\r\n" );
document.write( "The time equation is\r\n" );
document.write( "\r\n" );
document.write( "\r\n" );
document.write( "     +  = 10  hours.\r\n" );
document.write( "\r\n" );
document.write( "\r\n" );
document.write( "Solve it.\r\n" );
document.write( "\r\n" );
document.write( "Your first step is to multiply both sides by x*(x+9) to rid of the denominators.\r\n" );
document.write( "\r\n" );
document.write( "You will get a quadratic equation.\r\n" );
document.write( "\r\n" );
document.write( "Reduce it to the standard form and solve by any way you can.\r\n" );
document.write( "

\r
\n" ); document.write( "\n" ); document.write( "-------------------\r
\n" ); document.write( "
\n" ); document.write( "\n" ); document.write( "From this lesson, learn on how to write, how to use and how to solve a \"time\" equation.\r
\n" ); document.write( "
\n" ); document.write( "\n" ); document.write( "To see many other similar solved problems, look into the lessons\r
\n" ); document.write( "\n" ); document.write( "    - Had a car move faster it would arrive sooner\r
\n" ); document.write( "\n" ); document.write( "    - How far do you live from school? \r
\n" ); document.write( "\n" ); document.write( "    - Earthquake waves \r
\n" ); document.write( "\n" ); document.write( "    - Time equation: HOW TO use, HOW TO write and HOW TO solve it \r
\n" ); document.write( "\n" ); document.write( "in this site.\r
\n" ); document.write( "
\n" ); document.write( "
\n" ); document.write( "
\n" ); document.write( "\n" ); document.write( " \n" ); document.write( "

\n" );