document.write( "Question 832421: Natalie and Adam left the airport at the same time. They drove in opposite directions. Adam drove 60 mph faster than Natalie. After one hour they were 100 miles apart. Find Natalie's speed. \n" ); document.write( "

Algebra.Com's Answer #502038 by josmiceli(19441) $\"\"$ $\"About$

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You can think of Natalie as standing still
\n" ); document.write( "and Adam driving away from her at
\n" ); document.write( "the sum of their speeds
\n" ); document.write( "Let $\"+s+\"$ = Natalie's speed in mi/hr
\n" ); document.write( " $\"+100+=+%28+s+%2B+s+%2B+60+%29%2A1+\"$
\n" ); document.write( " $\"+100+=+2s+%2B+60+\"$
\n" ); document.write( " $\"+2s+=+40+\"$
\n" ); document.write( " $\"+s+=+20+\"$
\n" ); document.write( " $\"+s+%2B+60+=+80+\"$
\n" ); document.write( "Natalie's speed is 20 mi/hr
\n" ); document.write( "-----------------------
\n" ); document.write( "check:
\n" ); document.write( "For Natalie:
\n" ); document.write( " $\"+d%5B1%5D+=+20%2A1+\"$
\n" ); document.write( " $\"+d%5B1%5D+=+20+\"$ mi
\n" ); document.write( "For Adam:
\n" ); document.write( " $\"+d%5B2%5D+=+80%2A1+\"$
\n" ); document.write( " $\"+d%5B2%5D+=+80+\"$ mi
\n" ); document.write( " $\"+d%5B1%5D+%2B+d%5B2%5D+=+20+%2B+80+\"$
\n" ); document.write( " $\"+100+=+100+\"$
\n" ); document.write( "OK\r
\n" ); document.write( "\n" ); document.write( " \n" ); document.write( "

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