Answer:
B and E
Step-by-step explanation:
A. Incorrect; the expanded form of 3(4x + 3) is 12x + 9
B. Correct; the cumulative property of addition was applied here.
C. Incorrect; this adds up to 8x + 52, which is not equivalent to 12x + 9
D. Incorrect; this equals 13
E. Correct; this is the expanded form of 3(4x + 3)
