document.write( "Question 1039671: Find the 10th term of an arithmetic sequence whose 5th term is 1.25 and whose 15th term is 18. \n" ); document.write( "

Algebra.Com's Answer #654426 by Fombitz(32388) $\"\"$ $\"About$

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$\"a%5B5%5D=a%5B0%5D%2B%285-1%29d=1.25\"$
\n" ); document.write( "1. $\"a%5B0%5D%2B4d=1.25\"$
\n" ); document.write( ".
\n" ); document.write( ".
\n" ); document.write( " $\"a%5B15%5D=a%5B0%5D%2B%2815-1%29d=18\"$
\n" ); document.write( "2. $\"a%5B0%5D%2B14d=18\"$
\n" ); document.write( "Subtracting 1 from 2,
\n" ); document.write( " $\"a%5B0%5D%2B14d-a%5B0%5D-4d=18-1.25\"$
\n" ); document.write( " $\"10d=16.75\"$
\n" ); document.write( " $\"d=1.675\"$
\n" ); document.write( "and
\n" ); document.write( " $\"a%5B0%5D%2B4%281.675%29=1.25\"$
\n" ); document.write( " $\"a%5B0%5D=-5.45\"$
\n" ); document.write( "So then,
\n" ); document.write( " $\"a%5B10%5D=-5.45%2B%2810-1%29%281.675%29\"$
\n" ); document.write( " $\"a%5B10%5D=9.625\"$
\n" ); document.write( " \n" ); document.write( "

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