Question

If a•b=b, what must the value of a be?
A.1
B.0
C.2
D.b

Answer 1

B. 0

Explanation:

Any number multiplied by 0 equals zero.

Answer 2

a

Explanation:

an example

1x2=2

1 is a, 2 is b, see they equal the same 2 and 2.