ANSWER
When
is written in the form
, it looks like 
EXPLANATION
To write
in the form
, we have to complete the squares.
We add and subtract half the coefficient of
square.

The first three terms of the function is now a perfect square.

We now simplify rto obtain,

Answer:
The correct answer is d.
Step-by-step explanation:
Any point that is co planar with one another and is also equidistant from a given point is a circle. We need it to be co planar, otherwise it would be 3-dimensional and create a sphere. And if they we not all equidistant, they would not make an even circle (it'd be an oval or another shape).
Answer:
Option B, 8 / 6
Step-by-step explanation:
Tangent = Opposite / Adjacent
Tangent of ∠A = Opposite / Adjacent
Tan(A) = 8 / 6 which is the same as Option B
Hope this helps!