document.write( "Question 1089300: Greg drove at a constant speed in a rainstorm for 252 miles. He took a break, and the rain stopped He then drove 240 miles at a speed that was 4 miles per hour faster than his previous speed. If he drove for 13 hours, find the car's speed for each part of the trip. \n" ); document.write( "

Algebra.Com's Answer #703646 by josgarithmetic(39617) $\"\"$ $\"About$

You can put this solution on YOUR website!

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document.write( "               SPEED        TIME         DISTANCE\r\n" );
document.write( "RAIN            r           252/r         252\r\n" );
document.write( "NO RAIN         r+4         240/(r+4)     240\r\n" );
document.write( "Total                        13\r\n" );
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\r
\n" ); document.write( "\n" ); document.write( " $\"252%2Fr%2B240%2F%28r%2B4%29=13\"$ \r
\n" ); document.write( "\n" ); document.write( "-\r
\n" ); document.write( "\n" ); document.write( " $\"252%28r%2B4%29%2B240r=13%2Ar%28r%2B4%29\"$
\n" ); document.write( ".
\n" ); document.write( ".
\n" ); document.write( " $\"13r%5E2-440r-1008=0\"$ \r
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\n" ); document.write( "\n" ); document.write( "discriminant, $\"440%5E2%2B4%2A13%2A1008=246016=496%5E2\"$ \r
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\n" ); document.write( "\n" ); document.write( " $\"highlight_green%28r=%28440%2B496%29%2F%282%2A13%29=highlight%2836%29%29\"$ \n" ); document.write( "

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