Answer:
For the first one the answer is 12
Step-by-step explanation:
There is a formula for Sum of interior angles of a polygon:

This figure has 7 sides, n = 7

Add up all the given angles,
Subtract from 900,
This will give you value of x.
Answer:
Hidtochloratizwtf
Step-by-step explanation:wut
The answer is B. a liter is 1000cm3 so 5455 cm3 is 5455/1000= 5.455L