document.write( "Question 475236: I really need the answer to this funtion and how i came to my answer....
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Algebra.Com's Answer #325851 by Edwin McCravy(20055) $\"\"$ $\"About$

You can put this solution on YOUR website!
f(x)= x+10
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document.write( "Here is how to find f(-4):\r\n" );
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document.write( "1. Start with \r\n" );
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document.write( "f(x) = x + 10\r\n" );
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document.write( "2. Erase the x's and put a blank where the x's were.  Now you have\r\n" );
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document.write( "f(__) =  __ + 10\r\n" );
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document.write( "3. Put -4 in the blanks:\r\n" );
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document.write( "f(-4) =  -4 + 10\r\n" );
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document.write( "Take away the underlines:\r\n" );
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document.write( "f(-4) = -4 + 10\r\n" );
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document.write( "Combine the numbers on the right:\r\n" );
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document.write( "f(-4) = 6\r\n" );
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document.write( "That's it.  It's just a substitution problem.  You look in the\r\n" );
document.write( "parentheses after the f and whatever is in there tells you what to\r\n" );
document.write( "substitute for x in the right side.  Then you simplify the right\r\n" );
document.write( "side.\r\n" );
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document.write( "-----------------------\r\n" );
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document.write( "Here is how to find f(x+8):\r\n" );
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document.write( "1. Start with \r\n" );
document.write( "\r\n" );
document.write( "f(x) = x + 10\r\n" );
document.write( "\r\n" );
document.write( "2. Erase the x's and put a blank where the x's were.  Now you have\r\n" );
document.write( "\r\n" );
document.write( "f(___) =  ___ + 10\r\n" );
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document.write( "3. Put x+8 in the blanks:\r\n" );
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document.write( "f(x+8) =  x+8 + 10\r\n" );
document.write( "\r\n" );
document.write( "Take away the underlines:\r\n" );
document.write( "\r\n" );
document.write( "f(x+8) = x+8 + 10\r\n" );
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document.write( "Combine the numbers on the right:\r\n" );
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document.write( "f(-4) = x + 18\r\n" );
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document.write( "That's it.  It's just a substitution problem.  You look in the\r\n" );
document.write( "parentheses after the f.  Whatever is in there tells you what to\r\n" );
document.write( "substitute for x in the right side.  So you substitute and simplify\r\n" );
document.write( "the right side.\r\n" );
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document.write( "Don't try to make it hard.  Just substitute for x whatever number,\r\n" );
document.write( "letter of expression that's in the parentheses after the f, then\r\n" );
document.write( "simplify.  What could be easier?\r\n" );
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document.write( "Edwin

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