Answer:
I'm not sure but try 13.5.
Step-by-step explanation:
It might not be correct sorry
Answer:
idk
Step-by-step explanation:
im really stupid I need the points to ask my own question
Answer:

Step-by-step explanation:
We need to find the value of x so that the value of given function becomes 21 .
We have ,

Now , for finding x ,