Perform the Indicated Operation $( + 3 ) - ( - 9 )$

question 34

Short Answer

Perform the indicated operation. $( + 3 ) - ( - 9 )$

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Definitions:

East Coast

The easternmost boundary of a landmass or territory, which, in a country like the United States, refers to the coastline along the Atlantic Ocean.

Lithosphere

The rigid outer layer of the Earth, consisting of the crust and upper mantle, involved in plate tectonics movements.

Crust Thickness

The measure of the Earth's outermost layer's depth, which varies between oceanic and continental regions.

Crust Composition

The chemical and physical composition of the Earth's crust, including elements such as oxygen, silicon, aluminum, and iron.