Which expressions are equivalent to this expression? y+y+y+3z select each correct answer. 3+y+3z 3y+z 2y+2z+y+z 3(y+z)

D & C are the correct answers.This is because of the Distributive Property.  

y+y+y +3z = 3y + 3z.

3(y+z) also gives you 3y + 3z. 

C is correct because everything adds up to 3y +3z:
2y+2z+y+z = 3y +3z

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