let
x--------> the monthly fee
y--------> the administration fee
we know that
--------> equation 
--------> equation 
Multiply by
equation 
------> equation 
Adds equation
and equation 

Find the value of y

therefore
the answer is
the administration fee is equal to 
If you divide the price (10.80) by the weight (7lbs) you would get 1.54 per lbs
Answer:
D the horizontal cross-section of the pyramid and cone at the same height must have the same area
The answer is the top answer