Math Problems; Help Please!!?

Question

can you please name which one is a communative property or a associative property thanks too

1. a+y=y+a

2. 5(mxn) = (5xm)n

3. k+0=k

4. 3t+2r=2r+3t

5. 6(u+2v) = 6u+12v

6. 0=100x0

7. (2a+3b) + 4c = 2a +(3b=4c)

8. pq+n=qp+n

9. gx=xg

10. 15(c+d) =15(d+c)

Answer 1

it's commuTATIVE not commuNATIVE.

and commutative:

1

4

9

10

and i think? possibly 8 but i can't really remember if that's right or not.

associative:

2

7 [it's (3b+4c) not (3b=4c)]

i'm pretty sure it's right. and i think how i used to remember is to look for parentheses in order to recognize the associative property. yeup.