SOLUTION: If f(x)=-2x-5 find f(-1) Show work below: I came up with this but I don't know if it is right? -2*-1-5=-7 so (-1,-7) are the points?

Algebra ->  Linear-equations -> SOLUTION: If f(x)=-2x-5 find f(-1) Show work below: I came up with this but I don't know if it is right? -2*-1-5=-7 so (-1,-7) are the points?      Log On


   

Question 103866: If f(x)=-2x-5 find f(-1)
Show work below:
I came up with this but I don't know if it is right?
-2*-1-5=-7
so (-1,-7) are the points?
Answer by MathLover1(20855) About Me  (Show Source):
You can put this solution on YOUR website!
you said:

If f%28x%29=-2x-5+find f%28-1%29+
Show work below:
I came up with this but I don't know if it is right?
-2%2A-1-5=-7 here, you are multiplying -2 by -1and it is equal %2B2+
so (-1,-7) are the points? no, these are notthe points

you need to do it this way:

If f%28x%29=-2x-5, then f%28-1%29+ will be:
f%28-1%29+=+-2%28-1%29+-+5
f%28-1%29+=+2+-+5
+f%28-1%29+=+-3 result