Answer:
On simplification, 
Step-by-step explanation:
Here, the given expression is:

Now, we can perform operations only on LIKE TERMS,
So, in this expression, separate the like terms we get:

Hence, on simplification, 
Answer: x=38/7
Step-by-step explanation:
Answer:
4800 km
Step-by-step explanation:
240*20=4800
Answer:
The first 3 pairs of expressions are equivalent.
Step-by-step explanation:
Answer:
B
Step-by-step explanation:
A give me 2'zero
b give me 9'zero
c give 8'zero
d gives 5 zero
e give me 4'zero
for example it give me two zero it 100
or if five 5 zero it 100000
hope this helps