Answer:


Step-by-step explanation:
Given equation:

Divide both sides by 5:

Square half of the coefficient of
: 
and add this to both sides:

Factor the left side and simplify the right side:

Square root both sides:

Add 7 to both sides:

The earth travels one full rotation around the sun in approximately365.25 days.
There are 12.6803 quarts in 12 liters.
Answer: 77
Step-by-step explanation: Based on the order of operations or PEMDAS, parentheses are always done first.
So our first step in this problem is to simplify (9 + 2) to get 11.
So we now have (7) (11) which is 77.