document.write( "Question 259022: a brother and sister left their house at the same time. The brother headed east on his bike riding 13 miles per hour. The sister headed west on her skateboard riding 5 miles per hour. How long will it take them to be 9 miles apart? \n" ); document.write( "
Algebra.Com's Answer #190706 by rfer(16322)\"\" \"About 
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moving apart at 18 mph\r
\n" ); document.write( "\n" ); document.write( "9/18=.5 or 30 min
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