document.write( "Question 972342: Sylvia ran for 15 minutes at a rate of 5 miles per hour and then walked for 15 minutes at a rate of 4 miles per hour. What was her average speed? How far did she go? \n" ); document.write( "

Algebra.Com's Answer #594692 by josmiceli(19441) $\"\"$ $\"About$

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Average speed is always:
\n" ); document.write( "[ total distance traveled ] / [ total time spent traveling ]
\n" ); document.write( "Convert $\"+15+\"$ min to hrs:
\n" ); document.write( " $\"+15%2F60+=+1%2F4+\"$ hrs
\n" ); document.write( "---------------------
\n" ); document.write( " $\"+d%5B1%5D+=+5%2A%281%2F4%29+\"$
\n" ); document.write( " $\"+df%5B1%5D+=+5%2F4+\"$ mi
\n" ); document.write( "-------------------
\n" ); document.write( " $\"+d%5B2%5D+=+4%2A%28+1%2F4+%29+\"$
\n" ); document.write( " $\"+d%5B2%5D+=+1+\"$ mi
\n" ); document.write( "-------------------
\n" ); document.write( " $\"+d%5B1%5D+%2B+d%5B2%5D+=+5%2F4+%2B+4%2F4+\"$
\n" ); document.write( " $\"+d%5B1%5D+%2B+d%5B2%5D+=+9%2F4+\"$ mi
\n" ); document.write( "--------------------------
\n" ); document.write( " $\"+t%5B1%5D+%2B+t%5B2%5D+=+1%2F4+%2B+1%2F4+\"$
\n" ); document.write( " $\"+t%5B1%5D+%2B+t%5B2%5D+=+1%2F2+\"$ hr
\n" ); document.write( "----------------------
\n" ); document.write( "Average speed =
\n" ); document.write( " $\"+%28+9%2F4+%29%2F+%28+1%2F2+%29+=+9%2F2+\"$
\n" ); document.write( " $\"+9%2F2+=+4.5+\"$ mi/hr
\n" ); document.write( "The average speed is 4.5 mi/hr
\n" ); document.write( " $\"+9%2F4+=+2.25+\"$
\n" ); document.write( "She went 2.25 mi\r
\n" ); document.write( "\n" ); document.write( " \n" ); document.write( "

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