The answer is X=3 your welcome :)
Answer:

Step-by-step explanation:
Given
--- volume


Required
The surface area as a function of base length
The volume (V) is calculated as:



Make y the subject

Substitute 3 for V

The surface area of the open box is:


Substitute: 



Hence, the function is:

Answer:
D and F
Step-by-step explanation:
can be rewritten as
.
From there you can use the quadratic formula
(ignore the A, I can‘t seem to remove it), where a=1, b=4, and c=-8.

Then you get 
Then you get 
So 
Which means
or
which are choices D and F.
7,265 is the average of those two numbers, though i am not sure what the sign that is mentioned is