Answer:
A. 5.2% Decrease
Step-by-step explanation:
55 degrees
The supplementary angle is 55 because 180-125=55
Then subtract the interior angles 180-75-55=55
The square root of 2.25 is 1.5
You can rearrange f(x) as:
f(x) = 3(x^2 + 3x) + 12 = 3(x+1.5)^2 +5.25
So you can see the vertex is at (0,5.25) when x = -1.5
The axis of symmetry then lies in x = -1.5
