document.write( "Question 1117143: during a long distance race a competitor traveled a total of 28 kilometers over 8 hours. 18 k were traveled on river one and 10 k on river two. on the first river the competitor traveled an average of 4 k per hour greater than she traveled on the second river. what was the average speed of the competitor on the first river? \n" ); document.write( "
Algebra.Com's Answer #732125 by josgarithmetic(39630)\"\" \"About 
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document.write( "                 SPEED       TIME         DISTANCE\r\n" );
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document.write( "River1            r          18/r           18\r\n" );
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document.write( "River2           r-4         10/(r-4)       10\r\n" );
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document.write( "Total                         8             28\r\n" );
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\n" ); document.write( "\n" ); document.write( "\"18%2Fr%2B10%2F%28r-4%29=8\"------solve this for r. \n" ); document.write( "
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