Answer:
The mean is 9.
Step-by-step explanation:
How many numbers are there? 6.
The numbers add up to 54.
Divide 54 by 6, to get 9 numbers.
Answer:
The solution in the attached figure
Step-by-step explanation:
we have
-----> inequality A
The solution of the inequality A is the shaded area at left of the solid line x=-3
----> inequality B
The solution of the inequality B is the shaded area below the solid line 
The solution of the system of inequalities is the shaded area between the two solid lines
using a graphing tool
see the attached figure
Step-by-step explanation:
Using Pythagoras theorem:



