document.write( "Question 208037: A car is traveling on a road that is perpendicular to a railroad track. when the car is 30 meters from the crossing, the car's collision detector warns that there is a train 50 meters from the car and heading toward the same crossing. How far is the train from the crossing? \n" ); document.write( "

Algebra.Com's Answer #157356 by rapaljer(4671) $\"\"$ $\"About$

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This is a right triangle, so let x = distance of train down the track.
\n" ); document.write( " $\"30%5E2+%2B+x%5E2+=+50%5E2\"$
\n" ); document.write( " $\"900+%2B+x%5E2+=+2500\"$
\n" ); document.write( " $\"x%5E2+=1600\"$
\n" ); document.write( " $\"x=+40\"$ or $\"x=-40\"$ \r
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\n" ); document.write( "\n" ); document.write( "Reject the negative value.\r
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\n" ); document.write( "\n" ); document.write( "x= 40 meters\r
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\n" ); document.write( "\n" ); document.write( "R^2 \n" ); document.write( "

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