Answer:
Square.
Step-by-step explanation:
A square is a rectangle, but a rectangle is not a square.
Answer:
=
Step-by-step explanation:
Answer:
D
Step-by-step explanation:
Because you have to do work
Answer:
Option c
or 
Step-by-step explanation:
The absolute value is a function that transforms any value x into a positive number.
Therefore, for the function
x> 0 for all real numbers.
Then the inequation:
has two cases
if
(i)
if
(ii)
We solve the case (i)

We solve the case (ii)

Then the solution is:
or 