document.write( "Question 92497: If f(x)=1-3x,find f(-5). \n" ); document.write( "

Algebra.Com's Answer #67337 by bucky(2189) $\"\"$ $\"About$

You can put this solution on YOUR website!
All you have to do is to start with the equation you were given, replace every x with -5,
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\n" ); document.write( "Start with $\"f%28x%29+=+1+-+3x\"$
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\n" ); document.write( "Replace all the x's with -5:
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\n" ); document.write( " $\"f%28-5%29+=+1+-+3%28-5%29\"$
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\n" ); document.write( "do the calculations:
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\n" ); document.write( " $\"+f%28-5%29+=+1+-+%28-15%29\"$
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\n" ); document.write( "remove the parentheses on the right side. Because the parentheses are preceded by a minus
\n" ); document.write( "sign, when you remove the parentheses you change the sign of the term inside. The equation
\n" ); document.write( "then becomes:
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\n" ); document.write( " $\"f%28-5%29=+1+%2B+15+=+16\"$
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\n" ); document.write( "So the answer you are looking for is:
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\n" ); document.write( " $\"f%28-5%29+=+16\"$
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\n" ); document.write( "Hope this helps you to see how to do problems like these.
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