Answer: x = 110
They are supplementary angles.
Explanation:
Since the line is intersected, the two new angles must equal 180.
Using algebra, we can find it:
180 - 70 = 110.
Also, try to remember that completementary angles are for two angles that form a 90 degree angle when put together; you can use the trick of making the c into a 9.
Supplementary angles form a 180 degree angle when put together; a trick is slashing a line through the s to remember its for 8, or 180 degrees.
Hope this helps!