×·c-q.50=.50F you have to follow the steps
Given:
A diagram of a circle O,
.
To find:
The measure of arc DC.
Solution:
According to the angle of intersecting chords theorem:
Angle at intersection of chords = Half of the sum of intercepted arcs.
Let
be the angle between the intersection of chords AC and BD.
(Linear pair)

Using the angle of intersecting chords theorem, we get



On simplification, we get



Divide both sides by 2.

Now,



Therefore, the correct option is C.
Subtract 5x from both sides to make: 3x-4=8. Add four to both sides and divide by three, x=4.
Here his a link to how you solve this , please do not use it to cheat but to learn from it
http://ecsd-fl.schoolloop.com/file/1298972684338/1298972684200/3666926465936506857.pdf
Hope this helps !<span />
There were 4 terms in that expression