Answer :

It would equal 100 because you are taking -100 and basically doing the opposite so it would be 100 
The two straight lines around the number indicate absolute value. Absolute value is the distance from the number to zero (essentially how many marks away on a number line).

[tex]0 - (-100)[/tex]
[tex]0 + 100[/tex]
[tex]100[/tex]

It is equal to 100.

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