document.write( "Question 105328: I have a question concerning substitution and elimination. Goes like this:\r
\n" );
document.write( "\n" );
document.write( "Maria drove from Owen Sound to Ottawa, a distance of 550 km. The trip took 7 h. Maria drove at 70 km/h for part of the trip and at 85 km/h for the remainder of the trip. How far did she drive at 70 km/h?\r
\n" );
document.write( "\n" );
document.write( "Can you please answer this detailed for me>? \n" );
document.write( "
Algebra.Com's Answer #76647 by checkley75(3666)![]() ![]() ![]() You can put this solution on YOUR website! 70T+85(7-T)=550 \n" ); document.write( "70T+595-85T=550 \n" ); document.write( "-15T=550-595 \n" ); document.write( "-15T=-45 \n" ); document.write( "T=-45/-15 \n" ); document.write( "T=3 HOURS DRIVEN @ 70KM/H \n" ); document.write( "7-3=4 HOURS DRIVEN @ 85 KM/H \n" ); document.write( "PROOF \n" ); document.write( "70*3+85*4=550 \n" ); document.write( "210+340=550 \n" ); document.write( "550=550 \n" ); document.write( " |