(2) Answers
Two minus signs acting on the same number become a plus sign. (Going negatively down is the same thing as going up.) -(-9) = +9 or just plain 9.
[latex]-(-9)=+9[/latex] or [latex]9[/latex]
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Two minus signs acting on the same number become a plus sign. (Going negatively down is the same thing as going up.) -(-9) = +9 or just plain 9.
[latex]-(-9)=+9[/latex] or [latex]9[/latex]