Answer:

Step-by-step explanation:

Answer:
B, it's the only plausible one. A is wrong because the value would be above 180°
1. n=18
2. n=18
3. x=4
4. a= -12
5. x=3
Answer:
x=-3
Step-by-step explanation:
The quadratic function
determines the parabola which has the vertex at point (-3,5). The axis of symmetry passes through the vertex and is parallel to the y-axis. Hence, its equation is x=-3 (see attached diagram).