Answer:
y=2x
Step-by-step explanation:
I'll use subscript notation for brevity, i.e.
.
By the chain rule,



We have

and

When
, we have

and the partial derivatives take on values of

So we end up with

Answer: 7x + 4 y = 2
9x - 4y= 30
-------------------
16x / = 32
x= 32:16
x=2
Step-by-step explanation: 7x+4y=2
7*2 + 4y=2
14 +4y=2
4y= 2-14
4y= -12
y= -12 : 4
y= - 3
Answer:
15 because 32 - 17 = 15
Step-by-step explanation: