Given f(x)=2x+4, find f(a-4)
a) 2a-4
b) 2a
c) a+2
d) a-4
To solve functions like this plug (a-4) into the equation for each instance of x.
For your equation it would be setup like this:
f(a-4)=2(a-4)+4
f(a-4)=2a-8+4
f(a-4)=2a-4
So the answer is A) 2a-4
thank you so much
To find f(a-4), we need to substitute (a-4) for x in the function f(x)=2x+4.
So, let's replace x with (a-4):
f(a-4) = 2(a-4) + 4
Now we can simplify the expression:
f(a-4) = 2a - 8 + 4
f(a-4) = 2a - 4
Therefore, the correct answer is (a) 2a - 4.