Respuesta :

fnej

Answer:

B) 50

Step-by-step explanation:

<b = x

All angles in a triangle add up to 180 so:

x + 90 + 40 = 180

x + 130 = 180

x = 180 - 130

x = 50

yaelismmo

Answer:

I think its 60

Step-by-step explanation:

I hope i did good! Hopefully i helped!