Which expression represents the opposite of the coordinate for the point between B and C?

A) -(-30)
B) -(30)
C) -(31)
D) -[-(-31)]

100 points for answering

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What is the measure of the smallest angle in the diagram? 15 29 32 45

Ageologist had two rocks on a scale that weighed 4.6 kilograms together.rock a was 0.5 of the total weight.how much did rock a weigh?