document.write( "Question 453484: Two cars start from towns 840 miles apart and travel toward each other. They meet after 7 hours. Find the speed of each car if one travels 10mph faster than the other. \n" ); document.write( "
Algebra.Com's Answer #311560 by pedjajov(51)![]() ![]() ![]() You can put this solution on YOUR website! Each car travels r*t miles where: \n" ); document.write( "r - speed of the car \n" ); document.write( "t - time it travels \n" ); document.write( ": \n" ); document.write( "If first car travels with speed r, then the other one travels with speed r+10. \n" ); document.write( ": \n" ); document.write( "After 7 hours first car travels 7r miles, while other one travels 7(r+10) miles. \n" ); document.write( "Together they travel 840 miles. \n" ); document.write( ": \n" ); document.write( "7r+7(r+10)=840, divide by 7 \n" ); document.write( "r+r+10=840, combine like terms \n" ); document.write( "2r+10=120, subtract 10 \n" ); document.write( "2r=110, divide by 2 \n" ); document.write( "r=55 \n" ); document.write( ": \n" ); document.write( "First car travels with speed of 55 mph, while the other one travels 65mph. \n" ); document.write( " \n" ); document.write( " |