SOLUTION: Given f(x) = 2x + 5, find f(–1).

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Question 117209: Given f(x) = 2x + 5, find f(–1).
Answer by jim_thompson5910(35256) About Me  (Show Source):
You can put this solution on YOUR website!

f%28x%29=2x%2B5 Start with the given function.


f%28-1%29=2%28-1%29%2B5 Plug in x=-1. In other words, replace each x with -1.


f%28-1%29=-2%2B5 Multiply 2 and -1 to get -2


f%28-1%29=3 Now combine like terms