document.write( "Question 1034181: The Family Fine Arts Center charges $21 per adult and $12 per senior citizen for its performances. On a recent weekend evening when 486 people paid admission, the total receipts were $6894. How many who paid were senior citizens?\r
\n" ); document.write( "\n" ); document.write( " a. 208 senior citizens
\n" ); document.write( " b. 368 senior citizens
\n" ); document.write( " c. 118 senior citizens
\n" ); document.write( " d. 278 senior citizens
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Algebra.Com's Answer #648785 by ikleyn(52781)\"\" \"About 
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\n" ); document.write( " The Family Fine Arts Center charges $21 per adult and $12 per senior citizen for its performances. On a recent weekend evening when 486 people paid admission, the total receipts were $6894. How many who paid were senior citizens?\r
\n" ); document.write( "\n" ); document.write( " a. 208 senior citizens
\n" ); document.write( " b. 368 senior citizens
\n" ); document.write( " c. 118 senior citizens
\n" ); document.write( " d. 278 senior citizens
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\n" ); document.write( "\n" ); document.write( "Answer. Option b. 368 senior citizens.\r
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\n" ); document.write( "\n" ); document.write( "Solution. \r
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document.write( "Let s be the number of seniors.\r\n" );
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document.write( "Then the number of adults is (486-s).\r\n" );
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document.write( "The value function is f(x) = 12*s + 21*(486-s) dollars.\r\n" );
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document.write( "Only s = 368 gives the value of $6894.\r\n" );
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document.write( "To find the answer, you actually do not need to solve the equation.\r\n" );
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