Answer:
and 
Step-by-step explanation:
n is a number.
a number squared is 
27 more than a number squared is 
n is a number.
three times a number is 3 times n, or 
one less than that is 
Hope this answer helped! :)
4 I think because you subtract all since it's 60 min
Answer: 0
Step-by-step explanation:
To find the slope, you would need to use the formula
.

The slope is 0, meaning the line is horizontal.
We divide the total sum of the angles by 20

=18 sides