Answer:
Step-by-step explanation:

Yes most likely a variable square can be combined with a variable I believe
Answer:
W
Step-by-step explanation:
the rule of a 90⁰ counterclockwise rotation is (x,y) -> (-y,x)
For example, if you rotated a point at (3,2) by 90⁰ counterclockwise. You would change it to (-2,3).
Answer:
commutative
Step-by-step explanation:
you are typing the same numbers but in different order