Final answer:
Grouping symbols are used to indicate a group of terms that should be treated as one term in an expression. The order of operations is a set of rules used to determine the proper order for performing operations in an expression. A first-degree variable is a variable raised to the power of 1.
Step-by-step explanation:
Grouping symbols: These are symbols that are used to indicate a group of terms that should be treated as one term or to indicate operations that must be performed before other operations are attempted in an expression. Examples of grouping symbols include parentheses (), brackets [], and braces {}.
Order of operations: This refers to a set of rules used to determine the proper order for performing operations in an expression that involves more than one operation. The order of operations is often remembered using the acronym PEMDAS, which stands for Parentheses, Exponents, Multiplication and Division (from left to right), and Addition and Subtraction (from left to right).
First-degree variable: A first-degree variable refers to a variable raised to the power of 1. In other words, the exponent of the variable is 1. An example of a first-degree variable is x.
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