Answer:
a,c,d
Step-by-step explanation:

The appropriate choice is ...
C) -x^3 + x^2 - 1
You divide both numbers by the greatest common factor, which in this case is the number 8 so the equation would look some what like this
16/8=2
8/8=1
The ratio is 2:1
98.07. its a longer number but thats it for short.
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:

