52 i believe.
42 + 45 + 58 + 63 = 208
208 / 4 = 52
Answer: 
Step-by-step explanation:
Given
The two communication mask are 2 km apart
Ubi's home is 500 m east of one of the mask
Suppose its distance from the other's is x
From the figure, we can write
Answer:
idk this stuff yet
Step-by-step explanation:
I believe it is this one here. If you have any questionable let me know