Answer:
8
Step-by-step explanation:
He made 80 and 72 were sold
Answer:
b = h*D +hg^3
Step-by-step explanation:
b/h = D +g^3
Multiply each side by h
h* b/h = h*D +hg^3
b = h*D +hg^3
By making 80=2x+20 by corresponding angles in parallel lines you find x=30 because 2(30)+20=80
That's a hard one either c or d
Answer: 
Step-by-step explanation:
Let u be a differentiable function , then
(1)
Given function : 
Differentiate both sides with respect to x , we get
(By using (1))
[∵
]
Hence, the derivative of the given function is
.