document.write( "Question 1121271: If f(x) = 6x + 7 and g(x) = x² - 4, find each value. \r
\n" ); document.write( "\n" ); document.write( "1.) f(-3)
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\n" ); document.write( "5.) g(a) + 9
\n" ); document.write( "How do I solve? \n" ); document.write( "
Algebra.Com's Answer #737078 by Edwin McCravy(20056)\"\" \"About 
You can put this solution on YOUR website!
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document.write( "Just substitute for x whatever is in the parentheses after f or g,\r\n" );
document.write( "then simplify.\r\n" );
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document.write( "If f(x) = 6x + 7 and g(x) = x² - 4, find each value. \r\n" );
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document.write( "1.) f(-3) \r\n" );
document.write( "Substitute (-3) for x in f(x) = 6x + 7\r\n" );
document.write( "                        f(-3) = 6(-3) + 7\r\n" );
document.write( "                        f(-3) = -18 + 7\r\n" );
document.write( "                        f(-3) = -11 \r\n" );
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document.write( "2.) f(m)\r\n" );
document.write( "Substitute (m) for x in f(x) = 6x + 7\r\n" );
document.write( "                        f(m) = 6(m) + 7\r\n" );
document.write( "                        f(m) = 6m + 7\r\n" );
document.write( "                         \r\n" );
document.write( "3.) f(r-2)\r\n" );
document.write( "Substitute (r-2) for x in f(x) = 6x + 7\r\n" );
document.write( "                        f(r-2) = 6(r-2) + 7\r\n" );
document.write( "                        f(r-2) = 6r - 12 + 7\r\n" );
document.write( "                        f(r-2) = 6r - 5  \r\n" );
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document.write( "4.) g(5)\r\n" );
document.write( "Substitute (5) for x in g(x) = x² - 4\r\n" );
document.write( "                        g(5) = (5)² - 4\r\n" );
document.write( "                        g(5) = 25 - 4\r\n" );
document.write( "                        g(5) = 21 \r\n" );
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document.write( "5.) g(a) + 9\r\n" );
document.write( "Substitute (a) for x in g(x) = x² - 4\r\n" );
document.write( "                        g(a) = (a)² - 4\r\n" );
document.write( "                        g(a) = a² - 4\r\n" );
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document.write( "Then add +9 to both sides:\r\n" );
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document.write( "                    g(a) + 9 = a² - 4 + 9\r\n" );
document.write( "                    g(a) + 9 = a² + 5\r\n" );
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document.write( "Edwin
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