document.write( "Question 975873: Julie recently drove to visit her parents who live 450 miles away. On her way there her average speed was 24 miles per hour faster than on her way home (she ran into some bad weather). If Julie spent a total of 20 hours driving, find the two rates. \n" ); document.write( "
Algebra.Com's Answer #597540 by josgarithmetic(39620)![]() ![]() ![]() You can put this solution on YOUR website! Two-way drive, same distance d each way. Going, rate was r+k, using k as known and positive, but r as unknown. Trip returning, rate was r, an unknown. Total time driving was t hours. Find r, and use it to find r+k.\r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "________________rate____________time____________distance \n" ); document.write( "GOING___________r+k______________________________d \n" ); document.write( "RETRG____________r_______________________________d \n" ); document.write( "Total___________________________t________________2d\r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "KNOWN VARIABLES \n" ); document.write( "k,d, t \n" ); document.write( "UNKNOWN: r \n" ); document.write( "Solve for r.\r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "Basic uniform rates rule for travel, RT=D.\r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "________________rate____________time____________distance \n" ); document.write( "GOING___________r+k_____________d/(r+k)___________d \n" ); document.write( "RETRG____________r______________d/r_______________d \n" ); document.write( "Total___________________________t________________2d\r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "EQUATION FOR THE DESCRIPTION: \n" ); document.write( " \n" ); document.write( "Solve for r. The other variables are already given. \n" ); document.write( "Substitute the given values in the solution of r to evaluate. \n" ); document.write( " |