C: 2,6 and d: 0,26 i hope it helped :)
Answer:
f^(-1)(x) = \frac{-1}{5} (x+4)
Step-by-step explanation:
Given is a function

To find its inverse.
We must check whether f is one to one or onto first
If -5x1-4 = -5x2-4 we get x1=x2
Hence f is one to one
Also for every f(x) we can find a x so f is onto.
So inverse exists
Let

Replace x by f inverse and y by x

The perimeter is 7500 yd because u multiple 50 by 300 to get 15,000 then divide that by 2 to get 7,500
-2a^2 - 25ab - 27b^2
hope this helps :)