document.write( "Question 117209: Given f(x) = 2x + 5, find f(–1). \n" ); document.write( "

Algebra.Com's Answer #85247 by jim_thompson5910(35256) $\"\"$ $\"About$

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\n" ); document.write( " $\"f%28x%29=2x%2B5\"$ Start with the given function.\r
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\n" ); document.write( "\n" ); document.write( " $\"f%28-1%29=2%28-1%29%2B5\"$ Plug in $\"x=-1\"$ . In other words, replace each x with -1.\r
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\n" ); document.write( "\n" ); document.write( " $\"f%28-1%29=-2%2B5\"$ Multiply 2 and -1 to get -2\r
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\n" ); document.write( "\n" ); document.write( " $\"f%28-1%29=3\"$ Now combine like terms \n" ); document.write( "

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