http://prntscr.com/bct0ih

Which reason describes statement 4 in the proof?

A.Distributive Property

B.Associative Property of Multiplication

C.Commutative Property of Multiplication

D.Identity Property of Multiplication

Question

http://prntscr.com/bct0ih

Which reason describes statement 4 in the proof?

	
A.Distributive Property

	
B.Associative Property of Multiplication

	
C.Commutative Property of Multiplication

	
D.Identity Property of Multiplication

mjdennis · Answer

What are your thoughts?  Any choices obviously wrong?

gokuporter · Answer

I think its commutative

gokuporter · Answer

D and A are wrong

gokuporter · Answer

@mjdennis

mjdennis · Answer

A and D are indeed wrong.
The wolfram alpha site says that "the commutative property of multiplication states that two numbers can be multiplied in either order".  I don't see the order change in step 4, what I see are that the groupings change, which variable _associate_ with which.

jim_thompson5910 · Answer

They made a typo on step 4. The 'c' in the red box should be a 'b'

gokuporter · Answer

@jim_thompson5910 Weird! It is showing b now http://prntscr.com/bcuh69

jim_thompson5910 · Answer

hmm that is bizarre