1st one is x=-2 and y=-2Step-by-step explanation:
It says y - x so whatever x is y has the same value
Use the chain rule:

We have


so we get

Alternatively, you can substitute <em>u</em> in the definition of <em>y</em> and differentiate with respect to <em>x</em> :

Answer:
b/-4+8=5
Multiply each side by 4
-b+32=20
Move the constant to the right
-b=20-32
-b=-12
Change the signs
b=12
Hi there!
A recipe for cake needs 3/4 of a cup of milk.
We are making 1/2 of the recipe, which means we also need half of the milk needed for the total recipe. Therefore, we can multiply 1/2 (half of the recipe) by 3/4 (the total amount of cups of milk needed for the total recipe).

Hence, we need
3/8 cups of milk
Step-by-step explanation:
16.80 - 20% of 16.80 = 13.44
you paid 13.44$