Answer:
(-1,-2)
Step-by-step explanation:
Let's bring back to memory vertex formula for parabolas.

Where (h,k) is the vertex.
In 
The vertex is (-1,-2)
Answer:
Step-by-step explanation:

Answer:
r = -0.0056 --> 5.6%
Step-by-step explanation:
Answer:
x=−5 and y=1
Step-by-step explanation:
Could you possibly add to this post what your goal is? Are you supposed to graph this inequality?
19-x≥21 can be solved for x. Please do that now. If you have the skill and the interest, please graph your solution.