Answer:

Step-by-step explanation:
Differentiating, you get ...
... x·dy +y·dx +dx +dy = 2x·dx +2y·dy
Collecting terms gives ...
... dy(x +1 -2y) = dx(2x -y -1)
... dy/dx = -(2x -y -1)/(2y -x -1)
Answer:
b,f is right
Step-by-step explanation:
Answer:

Step-by-step explanation:
None
Check the image below for your answer. Hope this helped!
Answer equal to 3 because 3+4 =8-5 equal 3