document.write( "Question 1125034: A van​ averages 9 miles per hour faster than a car. If the van travels 100 miles in the same time it takes the car​ to travel 70 miles, then what is the speed of each? \n" ); document.write( "
Algebra.Com's Answer #741369 by josgarithmetic(39618)\"\" \"About 
You can put this solution on YOUR website!
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\n" ); document.write( "A van​ averages 9 miles per hour faster than a car. If the van travels 100 miles in the same time it takes the car​ to travel 70 miles, then what is the speed of each?
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\n" ); document.write( "A van​ averages k miles per hour faster than a car. If the van travels D miles in the same time it takes the car​ to travel d miles, then what is the speed of each?
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\n" ); document.write( "\n" ); document.write( "(Note very carefully, \"d%3C%3ED\" ).\r
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document.write( "Unknowns:  x and r\r\n" );
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document.write( "           SPEED          TIME         DISTANCE\r\n" );
document.write( "VAN         r+k           x=D/(r+k)        D\r\n" );
document.write( "CAR         r             x=d/r            d\r\n" );
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\n" ); document.write( "\"D%2F%28r%2Bk%29=d%2Fr\"
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\n" ); document.write( "\"d%28r%2Bk%29=Dr\"
\n" ); document.write( "\"dr%2Bdk=Dr\"
\n" ); document.write( "\"Dr-dr=dk\"\r
\n" ); document.write( "\n" ); document.write( "\"r%28D-d%29=dk\"\r
\n" ); document.write( "\n" ); document.write( "\"highlight%28r=%28dk%29%2F%28D-d%29%29\"-----substitute your given values.
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