Given the figure of a cyclic quadrilateral
The sum of the opposite angles = 180
so, we can write the following equations:

we will find (x) from equation (1):
x = 180 - 100 = 80
We will find (y) from equation (2):
2y = 180 - 102
2y = 78
y=78/2 = 39
So, the answer will be:
x = 80
y = 39
The answer to your specific question is

students.
Ellipse is your answer, because if you plug the equation into a graphing calculator and identify the conic, the term ellipse is given-
If you divide 21/49 by 7 you get 3/7
Answer:
6x + 2 ( x - 4) = 8 + 4 ( x + 2)
6x + 2x - 8 = 8 + 4x + 8
<em><u>Arranging</u></em><em><u> </u></em><em><u>like</u></em><em><u> </u></em><em><u>terms</u></em><em><u> </u></em>
6x + 2x - 4x = 8 +8 - 8
8x - 4x = 8
4x = 8
x = 8/4
x = 2