Answer: B and D
Step-by-step explanation:
B=-2
D=2
The negative and positive signs cancel out, leaving you with zero.
Ex: you take two steps back, but then you take two steps forward so you're back where you started (0).
Answer:
F.
Step-by-step explanation:
20=4*5
9=4+5
Answer:
A
Step-by-step explanation: