Answer:
vertex = (0, -4)
equation of the parabola: 
Step-by-step explanation:
Given:
- y-intercept of parabola: -4
- parabola passes through points: (-2, 8) and (1, -1)
Vertex form of a parabola: 
(where (h, k) is the vertex and
is some constant)
Substitute point (0, -4) into the equation:

Substitute point (-2, 8) and
into the equation:

Substitute point (1, -1) and
into the equation:

Equate to find h:

Substitute found value of h into one of the equations to find a:

Substitute found values of h and a to find k:

Therefore, the equation of the parabola in vertex form is:

So the vertex of the parabola is (0, -4)
Answer:
The helicopter must cover a straight line distance of approximately 61.270 miles from the hospital to the wreck site.
:)
Step-by-step explanation:
Answer:
8/2
eight halves
Step-by-step explanation:
please mark this answer as brainliest
the shortest side is always opposite the smallest angle.
In triangle ABC the shortest side is AC
In triangle ADC the shortest side is DC
DC<AC since they are in the same triangle.
Answer:
121.7
Step-by-step explanation:
73
+48.7
=121.7
121.7
-73
=48.7