is conservative if we can find a scalar function
such that
. This is equivalent to solving the system of PDEs,


Integrate both sides of the first PDF with respect to
:

where
is some function independent of
. Then differentiatng with respect to
, we have


and so
is indeed conservative, with

Having a $75 added cost to the total price, we can presume they will never equal. It is easy to see if you make it algebraic:

They will never equal each other.
Answer:
C. The total amount spent on drinks by Andrew.
Step-by-step explanation:
y itself would be the number of drinks purchased, and 2.5 is the cost. And since is is 2.5y then it represents the total amount.
AB is 6
BC is 4
CD is 6
DA is 8
A is 45degrees
B is 130dgrees
C is 130degrees
D is 45degrees (about)
The answer is 8 hope this helps all u have to do is figure out what two numbers added togher give you 18