By the chain rule,


We also have

,

, and

, so at this point we get
Take a better pic I can’t seee
Answer:
a)$5.25
b)$7.75
c)sorry i’m not sure
Step-by-step explanation:
Answer:
y = 218
Step-by-step explanation:
Mean = (Sum of all numbers)/(How many numbers present)
27 = (20 + 2y + 25 + y + 30)/27
27 = (3y + 75)/27
3y + 75 = 729
3y = 729 - 75
3y = 654
y = 218