document.write( "Question 900605: The Natchez Trace Parkway is a historical 444-mile route from Natchez, Mississippi, to Nashville, Tennessee. A couple drove the Trace in four days. Each day they drove 6 more miles than the previous day. How many miles did they drive each day?
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\n" ); document.write( "I set it up as follows: x+x+6+x+6+x+6=444
\n" ); document.write( " 4x+18=444
\n" ); document.write( " 4x=426
\n" ); document.write( " x=106.2 miles \n" ); document.write( "
Algebra.Com's Answer #546104 by richwmiller(17219)\"\" \"About 
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x+x+6+x+12+x+18=444
\n" ); document.write( "4x+36=444
\n" ); document.write( "4x=408
\n" ); document.write( "x=102 the first day\r
\n" ); document.write( "\n" ); document.write( "This is an arithmetic progression
\n" ); document.write( "S = ½(2*a1 + (n-1)d)n
\n" ); document.write( "444 = ½(2*a1 + (3)6)4
\n" ); document.write( "a1 = 102\r
\n" ); document.write( "\n" ); document.write( "102 the first day
\n" ); document.write( "102+6=108 the second day
\n" ); document.write( "108+6=114 the third day
\n" ); document.write( "114+6=120 the 4th day
\n" ); document.write( "102+108+114+120=444
\n" ); document.write( "x+x+6+x+12+x+18
\n" ); document.write( "an = a1 + (n - 1)d\r
\n" ); document.write( "\n" ); document.write( "a2 = 102 + (1)6=108
\n" ); document.write( "a3 = 102+ (2)6=114
\n" ); document.write( "a4 = 102 + (3)6=120\r
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