Answer:
Option D.
Step-by-step explanation:
To find the inversion of a function follow the following procedure
1) Replace x with y in the function and clear y
------> 


2) Check. The range of f(x) is the domain of
.
So if f(a) = b, this means that
= a.


Is fulfilled. Therefore
is the inverse of 
If your trying to find W, W equals 51
English translation:
If the quality control manager wants to estimate the average life of lamps with 20 hours, with a confidence level of 95% and an error of 10% is assumed. What is the sample size?
2x = -11 + 9
2x = -2
x= 2/2
x= 1
Answer:
x= 2y - 3/2
Step-by-step explanation:
Isolate the variable by dividing each side by factors that don't contain the variable.