I think you multiply them together
So they are asking to subtract, therefore it is 8.10-3.49=4.61 SO HE SPENT $4.61 Hope this helped!
Answer:
part b: c.) (0,0)
Step-by-step explanation:
Answer:



Step-by-step explanation:
The given function is

We need to find first partial derivatives of the function.
Differentiate partially w.r.t. x and y, z are constants.


Differentiate partially w.r.t. y and x, z are constants.


Differentiate partially w.r.t. z and x, y are constants.



Therefore, the first partial derivatives of the function are
.
Answer:
a>-1/3
Step-by-step explanation:
-7a-2a<3
-9a<3
-a<3/9
a>-3/9
a>-1/3
You switch the sign because your dividing by a negative.