document.write( "Question 1057506: The current in a stream moves at a speed of 7 mph. A boat travels 38 mi upstream and 38 mi downstream in a total time of 3 hr. What is the speed of the boat in still water?\r
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\n" ); document.write( "\n" ); document.write( "The outside of a picture frame measures 14 in by 20 in. 184 in. squared of the picture shows. Find the thickness of the frame. \n" ); document.write( "

Algebra.Com's Answer #672539 by josgarithmetic(39620) $\"\"$ $\"About$

You can put this solution on YOUR website!

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document.write( "                SPEED       TIME      DISTANCE\r\n" );
document.write( "UPSTREAM        r-7         38/(r-7)    38\r\n" );
document.write( "DOWNSTR         r+7         38/(r+7)    38\r\n" );
document.write( "Total                         3\r\n" );
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\n" ); document.write( "\n" ); document.write( "Uniform width of frame, ok, but not enough information for its thickness.
\n" ); document.write( "Width of frame instead:
\n" ); document.write( " $\"184=%2814-2w%29%2820-2w%29\"$ ;
\n" ); document.write( "which is, the given picture area is equal to the inner frame area. \n" ); document.write( "

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