document.write( "Question 663282: What is the value of g[f(3)] for the functions f(x) = 3x – 5 and g(x) = x + 1? (Type only the value of your final answer, no variables.) \r
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Algebra.Com's Answer #412694 by Edwin McCravy(20059) $\"\"$ $\"About$

You can put this solution on YOUR website!
What is the value of g[f(3)] for the functions f(x) = 3x – 5 and g(x) = x + 1?
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document.write( "I won't do it for you.  Instead I'll do one exactly like this one, \r\n" );
document.write( "and just change the numbers:\r\n" );
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\n" ); document.write( "What is the value of g[f(4)] for the functions f(x) = 4x – 7 and g(x) = x + 3?
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document.write( "            First find f(4) by substituting x=4 in f(x) = 4x - 7\r\n" );
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document.write( "                       f(x) = 4x - 7\r\n" );
document.write( "                       f(4) = 4(4) - 7\r\n" );
document.write( "                       f(4) = 16 - 7\r\n" );
document.write( "                       f(4) = 9\r\n" );
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document.write( "Now g[f(4)] is equal to g(9).  So we find g(9) by substituting x=9 \r\n" );
document.write( "in g(x) = x + 3.\r\n" );
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document.write( "                       g(x) = x + 3\r\n" );
document.write( "                       g(9) = 9 + 3\r\n" );
document.write( "                       g(9) = 12.\r\n" );
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document.write( "So g[f(4)] = g(9) = 12.\r\n" );
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document.write( "Do yours the exact same way.\r\n" );
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document.write( "

\n" ); document.write( "Change the given equation into slope-intercept form. 3x + 4y = 12
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document.write( "I'll do this one instead:\r\n" );
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\n" ); document.write( "Change the given equation into slope-intercept form. 4x + 5y = 20
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document.write( "                                4x + 5y = 20\r\n" );
document.write( "                                     5y = -4x + 20\r\n" );
document.write( "     Divide every term by 5\r\n" );
document.write( "                                     = x + \r\n" );
document.write( "                                      y = x + 4\r\n" );
document.write( "Do yours the exact same way.\r\n" );
document.write( "  \r\n" );
document.write( "Edwin

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