Question

which symbol should be used to write this phrase as an algebraic expression? 3 added to a number z

Explanation:

Step1: Analyze the phrase

The phrase is "3 added to a number \( z \)". In algebra, "added to" means using the addition operation.

Step2: Identify the symbol

The addition operation is represented by the '+' symbol. The other symbols: '-' is subtraction, and the dot is usually for multiplication (or decimal, but not relevant here). So the correct symbol is '+'.

Answer:

The symbol '+' (the middle option with the '+' sign)