Answer:
A. With each 9s fact you add another 9, which means you go straight down a row and back one space. This creates a diagonal pattern in the grid.
The axis of symmetry of a parabola in the form

is a vertical line

where k is the x coordinate of the vertex of the parabola.
The x coordinate of the vertex of the parabola is given by

which in your case is

So, the axis of symmetry is the line x=12.
The answer to this question will be D
Answer: x² + 4x + 3
<u>Step-by-step explanation:</u>
f(x) = x² + 3x + 2
+ <u>g(x) = x + 1 </u>
(f+g)(x) = x² + 4x + 3
Note: This answer is based on f(x) having an x² (since the squared is missing from your question).