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:
im not ok really and i don't know
Step-by-step explanation:
Add the like terms.
12r+11r-4r= 19r
5s+9s=14s
-7t=-7t
19r+14s-7t
Answer:
140
Step-by-step explanation:
Let total money spent by Eliza's be represented as x
Five times amount Eliza spent = 5x and total amount spent by Jade is $150
So it will be $10+ 5x =$150
5x= 150- 10
5x= 140
x = 140÷5
x= 28
........................
So therefore Eliza's amount spent = $28 and
5x$28 = $140
Jade spent $10 more equals $10+$140= $150(Total money spent by Jade).