document.write( "Question 928430: Karen jogged at an average rate of 8 mph from her house to school. She walked home at a rate of 4 mph. If the entire trip took 3 hours, how far is it from her home to school?
\n" );
document.write( " \n" );
document.write( "
Algebra.Com's Answer #563621 by TimothyLamb(4379)![]() ![]() You can put this solution on YOUR website! s = d/t \n" ); document.write( "t = d/s \n" ); document.write( "d = distance from home to school (miles) \n" ); document.write( "--- \n" ); document.write( "time to school: \n" ); document.write( "a = d/8 \n" ); document.write( "--- \n" ); document.write( "time to home: \n" ); document.write( "b = d/4 \n" ); document.write( "--- \n" ); document.write( "total time: \n" ); document.write( "a + b = 3 \n" ); document.write( "d/8 + d/4 = 3 \n" ); document.write( "4d/4*8 + 8d/4*8 = 3 \n" ); document.write( "4d + 8d = 3*4*8 \n" ); document.write( "12d = 3*4*8 \n" ); document.write( "d = 3*4*8/12 \n" ); document.write( "d = 8 \n" ); document.write( "--- \n" ); document.write( "d = distance from home to school (miles) = 8 \n" ); document.write( "--- \n" ); document.write( "Solve and graph linear equations: \n" ); document.write( "https://sooeet.com/math/linear-equation-solver.php \n" ); document.write( "--- \n" ); document.write( "Solve quadratic equations, quadratic formula: \n" ); document.write( "https://sooeet.com/math/quadratic-formula-solver.php \n" ); document.write( "--- \n" ); document.write( "Convert fractions, decimals, and percents: \n" ); document.write( "https://sooeet.com/math/fraction-decimal-percent.php \n" ); document.write( "--- \n" ); document.write( "Calculate and graph the linear regression of any data set: \n" ); document.write( "https://sooeet.com/math/linear-regression.php \n" ); document.write( " |