Respuesta :

Answer:

k = 10

Step-by-step explanation:

There are 180 degrees in a straight line, so ZYX must be 85 degrees. There are also 180 degrees in a triangle, so YZX + ZXY = 115.


4k + 5 + 6k + 10 = 115

10k + 15 = 115

10k = 100

k = 10