Hello, please consider the following.

And the average is

Thank you.
Answer:
x - 0.2x
Since the price of the hat is labelled = x,
The percentage discount on the hat price = 20%,
Thus, the discount = 20% of the price marked
= Twenty percent of x
=0.2 x =0.2 x
Therefore, the hat's new price = Marked price - Discount
= x- 0.2 = x
Answer: 
Step-by-step explanation:

1.a 2.b 3.c ,cout the individual lines in the middle to get the answer
Simplification of equation
is
.
<u>Step-by-step explanation:</u>
We have the following complex fraction to simplify:

⇒
{making denominator same of all expressions }
⇒
⇒ 
⇒
⇒ 
⇒
∴ Simplification of equation
is
.