12x-7
hope it helps.Thanking you
1. remember all of them add up equal to 360 degree.
2. add all of them up together

3. combine like term then solve for Y
4. you will figure the arc measure of BC when you get answer for Y.
Answer:
The first three terms are 
The 10th term is 
Step-by-step explanation:
An ordered list of numbers is known as a sequence such that each number in the sequence is called a term.
The nth term is
.
To find the first 3 terms, put 

To find the 10th term, put
in 

Answer:
x=7
Step-by-step explanation:
BRAINLIEST?
Answer:
Step-by-step explanation:
y = x
Slope of line = 1
Slope of perpendicular to line = -1
Point-slope equation for line of slope -1 through (2,2):
y-2 = -(x-2)
Slope-intercept equation:
y = -x + 4
Standard form:
x+y = 4