See attached picture for the answers:
Answer:
x = 215
Step-by-step explanation:
15^2-13=x-3
225 - 13 = x - 3
212 + 3 = x - 3 + 3
215 = x
Answer:
Length of the tunnel is 51.7 meters
Step-by-step explanation:
We are given that,
The surveyor is located 54 meters from one entrance at an angle of 56°.
The surveyor is located 31 meters from one entrance at an angle of 13°.
Let the length of the tunnel = x meters
So, using the law of cosines, we get,

i.e. 
i.e. 
i.e. 
i.e. x = 51.7 meters
Hence, the length of the tunnel is 51.7 meters
X + 4/3 = - 2
x = - 10/3
i am a mathematics teacher. if anything to ask please pm me