Final answer:
The expression 16.4z - 12 represents an algebraic expression with a variable 'z' and constants 16.4 and 12 using addition and subtraction. Hence the correct answer is option B
Step-by-step explanation:
The given expression, 16.4z - 12, is an algebraic expression. It represents a mathematical statement combining the variable 'z' with constants 16.4 and 12 using addition and subtraction operations. However, it is not an equation or a value since it does not have an equals sign or specific numerical values substituted for the variable 'z'.
Hence the correct answer is option B