Answer:
The amount required is ![l_t = 1586 \ m](https://tex.z-dn.net/?f=l_t%20%20%3D%20%201586%20%5C%20m)
Step-by-step explanation:
From the question we are told that
The length of one side is ![l_1 = 435 \ m](https://tex.z-dn.net/?f=l_1%20%3D%20%20435%20%5C%20m)
The length of the second side is ![l_2 = 656 \ m](https://tex.z-dn.net/?f=l_2%20%20%3D%20%20656%20%5C%20%20m)
The angle between the line of sight of second and third side is ![\theta = 49^o \\](https://tex.z-dn.net/?f=%5Ctheta%20%20%3D%20%2049%5Eo%20%5C%5C)
Generally using cosine rule the third side is evaluated as
![l_3^2 = l_1 ^2 + l_2^2 - 2 * l_1 * l_2 cos (\theta )](https://tex.z-dn.net/?f=l_3%5E2%20%3D%20%20l_1%20%5E2%20%20%2B%20l_2%5E2%20%20-%20%202%20%2A%20l_1%20%20%2A%20%20l_2%20%20cos%20%20%28%5Ctheta%20%29)
=> ![l_3^2 = 435 ^2 + 656^2 - 2 * 453* 656 cos (49)](https://tex.z-dn.net/?f=l_3%5E2%20%20%3D%20%20435%20%5E2%20%20%2B%20%20656%5E2%20%20-%20%202%20%2A%20453%2A%20656%20cos%20%2849%29)
=> ![l_3 = 495 \ m](https://tex.z-dn.net/?f=l_3%20%20%3D%20%20495%20%5C%20%20m)
The total amount of face required is mathematically evaluated as
![l_t = l_1 + l_2 + l_3](https://tex.z-dn.net/?f=l_t%20%20%20%3D%20l_1%20%20%2B%20l_2%20%2B%20l_3)
![l_t = 435 + 656 + 495](https://tex.z-dn.net/?f=l_t%20%20%3D%20%20435%20%2B%20%20656%20%2B%20%20495)
![l_t = 1586 \ m](https://tex.z-dn.net/?f=l_t%20%20%3D%20%201586%20%5C%20m)
To solve you can use inverse operations.
Here are the steps to find the answer:
1. Write out the equation: -6(x-2)+3x= -3(x+3) +21
2. Distribute both sides: -6x+12+3x= -3x-9+21
3. Simplify both sides: -3x+12=-3x+12
4. This equation is true for all values, or infinity, because the equation is the same on both sides
Let me know if you need further explanation. I hope this helps.
Answer:
It's between C and D. I would say it's D.
Step-by-step explanation:
Hope my answer has helped you!
Answer:\ b.
Step-by-step explanation:
Hope this helps!!