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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

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MajesticPotato12
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
answer is 

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

hope it helps

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