Respuesta :
since BE is 90 degrres
X +40 need to also equal 90
so x = 90-40 = 50 degrees
X +40 need to also equal 90
so x = 90-40 = 50 degrees
The correct answer is 50. The 40 degree angle and x are complementary angles, so they add up to 90 degrees. 90 degrees minus 40 degrees = x.