Answer: Let's evaluate the expression "(9 + 3) · 4" step by step:
Parentheses/Brackets: Calculate the expression inside the parentheses.
(9 + 3) = 12
Multiplication: Multiply the result from step 1 by 4.
12 · 4 = 48
Therefore, the correct step-by-step explanation is:
The expression "(9 + 3) · 4" simplifies to 48.