The answer to this is a n = a1 + d(n - 1)
Answer:
option 1
Step-by-step explanation:
step 1
Find the arc length of the complete circle
The circumference of the circle ios given by

we have

substitute


step 2
Find the arc length for a sector with a cenytral angle of 30 degrees
we know that
The complete circle subtends a central angle of 360 degrees
so
using proportion

Basically, we need to solve for x. That means that we will need to bring all the terms containing x over to one side and, in short, isolate x. To do this, we should first add 15 to both sides. Doing so gives us

. Next, we subtract 6/5x from both sides, resulting in

. Now, we multiply the reciprocal of -3/5 to 27. Doing so gives us x = -45. Therefore, the answer to your query is
x = -45. Hope this helps and have a nice day!