Respuesta :

The answer to 9 is 87.

The answer to 10 is x=91, y=89, and z=31

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Banabanana
9
In a triangle, the three interior angles always add to 180°
x = 180 - 28 - 65 = 87° 
(Choice B)

10
x = 180 - 51 - 38 = 91°
y = 180 - x = 180 - 91 = 89°
z = 180 - 89 - 60 = 31°
(Choice D)