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2 answers:
X=100°
As they are vertically opposite angles, meaning that the angle would be the same as the one that is vertically opposite to them.
hope it helps!
It is a 100 degrees vertical angles are congruent
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The compatible is
190 - 90 =
Answer:

cos 40°=AC : AB
AC = AB cos 40°
AC = 4 x cos 40°
AC = 3.064 = 3.1
When x is the problem for x plus y