Determine whether each statement is always, sometimes, or never true. Explain your reasoning. (By the way, this has to do with a

Question

Andrew [12]

3 years ago

9

Determine whether each statement is always, sometimes, or never true. Explain your reasoning. (By the way, this has to do with a

bsolute value) PLEASE HELP AND THANKS!
a. |x|= |-x|

b. |x|= -|x|

c. |-x|= -|x|

Mathematics

2 answers:

Mama L [17] · Answer 1 · 2022-07-14T23:34:31+03:00

Mama L [17]3 years ago

8 0

A is always
From what I have B and C are never because one will always end up negative while the other is positive.

Norma-Jean [14] · Answer 2 · 2022-07-14T21:08:19+03:00

A). |x| = |-x|
This is always true.
The definition of 'absolute' value is 'size of the number without its sign'.
That's what this expression says.

b). |x| = -|x|
This is never true, because an absolute value is never negative.
This one would true if x=0 . So maybe some people might say
it's sometimes true, but that doesn't feel right to me. I say never.

c). |-x| = -|x|
This looks to me like exactly the same situation as (b),
and I would say all the same things about it.