Answer:
5×10⁵
5×10⁶
Step-by-step explanation:
1)

2)

Answer: B
Step-by-step explanation:

The answer is 2xy-2x you get this by combining like terms
Answer:
8k
Step-by-step explanation:
if you multiply a number and a variable then they combine to make the equation the answer rather than a single number so your answer would be 8k