Respuesta :

mathstudent55

Answer:

D. x = 7

Step-by-step explanation:

The labeled angles are the acute angles of a right triangle, so they are complementary. Their measures add up to 90 deg.

8x + 7 + 3x + 6 = 90

11x + 13 = 90

11x = 77

x = 7

lex1kkkk
They are right triangles so you with do (8x+7)+(3x+6)=90 because a triangle is 180* so you got this !