Answer:
-17
Step-by-step explanation:
-16r=272
16r=-272
r=-17
Answer:
17.49286
Step-by-step explanation:
Photomath :)
Answer:
Yes, those two are equal.
Step-by-step explanation
(10p/2q)*2/2=5p/q
Answer:
answer is B 38-18
Step-by-step explanation:
38 + (-18)
38-18
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)