Answer:
6
Step-by-step explanation:
Given

Required
Solve

We start by converting the division sign to multiplication

Then, we divide -9 by 3
Then, we divide 8 by -4
Multiply -2 and -3 to give final result

Hence,
is equivalent to 6
Answer:
A 0.2 L water was filled into the bottle from faucet each seconds.
Step-by-step explanation:
Unit rate is defined as the rates are expressed as a quantity of 1, such as 3 feet per second or 6 miles per hour, they are called unit rates.
Given the statement: A 2 liter bottle is filled completely with water from a faucet in 10 seconds.
⇒ In 10 sec a 2L bottle is completely filled with water from a faucet.
Unit rate per second = 
Therefore, 0.2 L water was filled into the bottle each seconds.
Well this only simplifies to a smaller equation
so the answer would be...
2a²-9b²
The information is really hard to follow, you should ask the question with a screenshot of the data table.
The longest length you can get with no extra is 56cm