Answer: the answers are the second one and the last one
Step-by-step explanation:
Answer:
The focus is: 
Step-by-step explanation:
Given

Required
Determine the focus
The focus of a parabola

is:

So, we have:

Cross multiply

Rewrite as:

Rewrite as:

Express 8 as 4 * 2

By comparison with: 

So, the focus
is:


Answer:
It is an improper fraction.
Step-by-step explanation:
With fractions, if the numerator is equal to or grater than the denominator, the fraction is considered an improper fraction.