Answer:
See attachment
Step-by-step explanation:
The given function is 
This function is in the form:

Where the axis of symmetry is given by 
By comparison, we have -h=2.
This implies h=-2
Therefore the axis of symmetry is 
The maximum value occurs at the vertex, given by (h,k)=(-2,8)
See attachment for the axis of symmetry and maximum point.
Angle A is smallest
Then angle B
And angle C is largest
Should be correct... it may vary depending on where A, B, and C are located on the triangle
6x + 2y = 24....subtract 6x from both sides
2y = -6x + 24...now divide both sides by 2
y = -6/2x + 24/2...now reduce
y = -3x + 12 <=== slope intercept form of y = mx + b
Just plug it into a calculator and you would get 400
Just shaping your insides so I can easily pull you out of the washer