Question

Which pair of expressions is equivalent using the Associative Property of Multiplication?

5(3a ⋅ 4) = 15a ⋅ 20
5(3a ⋅ 4) = (3a ⋅ 4) ⋅ 5
5(3a ⋅ 4) = (5 ⋅ 3a) ⋅ 4
5(3a ⋅ 4) = 5 ⋅ 3a ⋅ 4

Answer 1

answer is

5(3a ⋅ 4) = (5 ⋅ 3a) ⋅ 4 (third choice)

hope it helps

Answer 2

First one is equivalent
Edit: I answered this too quickly without thinking about it
forgot that #1 only works if that was an addition or subtraction sign
Answer is #3