Question

Which expression is equivalent to 4(42)? select each correct answer A. 4(40 + 2) B. 4(20 + 22) C. 4(4 + 20) D. 4(4 + 2)

Answer 1

4(42)=168

4(40 + 2)=168

Add what is in the parenthesis

4(42)=168

Multiply

Final Answer: 168=168

B. 4(20 + 22)=168

Add what is in the parenthesis

4(42)=168

Multiply

168=168

The correct answer is A. 4(40 + 2) and B. 4(20 + 22)

Answer 2

By the PEMDAS rule, as long as the stuff inside the parentheses add up to 42, it would be correct. Therefore:

A. Correct because 40 + 2 = 42

B. Correct because 20 + 22 = 42

C. Incorrect because 4 + 20 = 24 ≠ 42

D. Incorrect, because 4 + 2 = 6 ≠ 42