document.write( "Question 1186524: A concert room has spaces for 10 seats in the first row, 13 in the second, 16 in the third, and so on.\r
\n" ); document.write( "\n" ); document.write( "a. If there are 20 rows in the theater, represent the total number of seats in the concert room in sigma notation.
\n" ); document.write( "b. What is the maximum number of seats that can be occupied in the said concert room? \n" ); document.write( "
Algebra.Com's Answer #817520 by MathTherapy(10552)\"\" \"About 
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A concert room has spaces for 10 seats in the first row, 13 in the second, 16 in the third, and so on.\r
\n" ); document.write( "\n" ); document.write( "a. If there are 20 rows in the theater, represent the total number of seats in the concert room in sigma notation.
\n" ); document.write( "b. What is the maximum number of seats that can be occupied in the said concert room?
\n" ); document.write( "
Formula for the SUM of an AP: \"matrix%281%2C3%2C+S%5Bn%5D%2C+%22=%22%2C+%28n%2F2%29%282a%5B1%5D+%2B+%28n+-+1%29d%29%29\", with \"matrix%283%2C3%2C+n%2C+%22=%22%2C+20%2C+a%5B1%5D%2C+%22=%22%2C+10%2C+d%2C+%22=%22%2C+3%29\"
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document.write( " \"matrix%281%2C3%2C+S%5Bn%5D%2C+%22=%22%2C+%28n%2F2%29%282a%5B1%5D+%2B+%28n+-+1%29d%29%29\" then becomes: 
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document.write( "Maximum number of seats with 20 rows, or  \n" );
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