I didn’t understand but when I understand I will help you
Answer: 15 !
Step-by-step explanation:
14 17/21 can be re-written as 14.8095
Which rounds to 15.
Hope this helped! :)
Answer:

Step-by-step explanation:

The interval notation is (-12, 12).

Answer:
The answer would be C
Step-by-step explanation:
You were going in the right direction but the problem was that you needed to subtract and not add. The formula should be y-y1 / x-x1 iirc. Hope this helped.
Answer:
see attachment
Step-by-step explanation:
The given equation is

The graph of the left hand side of this equation is

This quadratic graph has its vertex at (0,2) and turns upside down.
The right hand side of the equation is

This quadratic graph opens upwards and has its vertex at (0,-8).
The two graphs intersects at two points , which are (-2,0) and (2,0).