Final answer:
Symbols in an expression represent quantities, operations, and relationships in mathematics and can be related to real-world situations.
Step-by-step explanation:
In mathematics, symbols are used to represent quantities, operations, and relationships. These symbols can be letters, numbers, or other characters that have a specific meaning within the context of a mathematical expression.
For example, the symbol '+' represents addition, and the symbol 'x' represents multiplication.
In a real-world situation, the symbols in an expression can be related to the quantities or operations involved. For instance, if you have the expression '2x + 5', the symbol 'x' could represent the number of apples a person has, and the expression would then represent the total number of apples if you were to multiply that number by 2 and add 5.