Answer:
20
Step-by-step explanation:
if x is 20
6x would be 120
3x would be 60
120 + 60 = 180 which checks out
180 is the degree amount of a straight line
a.
In order to find the common ratio, we just need to divide a term by the term that comes before it.
So using the terms 20 and -5, we have:

b.
The recursive rule can be found with the formula:

Where an is the nth term and q is the ratio. So we have:

c.
The explicit rule can be written as:

Where an is the nth term, a1 is the first term and q is the ratio. So:
Answer:
B
Step-by-step explanation:
L<span> Angles are angles who share the same initial side and terminal sides. </span>