Question

if the measure of <BEC is (2x+3)° and x=30, which expression could represent the measure of <AED?​

Answer 1

The answer is 3x-27

Explanation:

If the angles are vertical from each other it means they are congruent. 2x+30 is 63, you plug in the x, 2(30)+30. You do that to the second one and also get 63, 3(30)-27. Therefore 3x-21 is the answer.