SOLUTION: f(x) = 2x-1 find f(-9)

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Question 69375: f(x) = 2x-1
find f(-9)
Answer by bucky(2189) About Me  (Show Source):
You can put this solution on YOUR website!
You are given the expression:
f(x) = 2x - 1
The notation f(-9) simply tells you that you substitute -9 for x in the expression
f(x) = 2x-1
In this case the substitution of -9 for x leads to:
f(-9) = 2(-9) - 1 = -18 - 1 = -19
so f(-9) = -19