SOLUTION: Use the function to answer the question. f(x) = 10x-5 What is the value of f –1(–4)?

Algebra ->  Functions -> SOLUTION: Use the function to answer the question. f(x) = 10x-5 What is the value of f –1(–4)?      Log On


   

Question 734761: Use the function to answer the question.
f(x) = 10x-5
What is the value of f –1(–4)?
Answer by stanbon(75887) About Me  (Show Source):
You can put this solution on YOUR website!
Use the function to answer the question.
f(x) = 10x-5
What is the value of f –1(–4)?
----
Find the value of x which makes y = -4
----
Solve 10x-5 = -4
10x = 1
x = 1/10
-----
Therefore f^(-1)(-4) = 1/10
---------------------------
Cheers,
Stan H.