What is the length of a diagonal of a square with a side length of 8? A. B. C. D. Please select the best answer from the choices
provided
2 answers:
The diagonal of a square is always √2 times the length of the side. Your diagonal length is
8√2
11.31 . . . . rounded to the nearest hundredth
Diagonal of a square is√2 times it's side ,
Hence diagonal = 8√2 = 11.31 units Ans.
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Given:
The four expression in the options.
To find:
Which expression is equal to –1.
Solution:
In option A,

In option B,

In option C,

![[\because \sin(\pi+\theta)=-\sin \theta]](https://tex.z-dn.net/?f=%5B%5Cbecause%20%5Csin%28%5Cpi%2B%5Ctheta%29%3D-%5Csin%20%5Ctheta%5D)

In option D,

![[\because \tan(\pi+\theta)=\tan \theta]](https://tex.z-dn.net/?f=%5B%5Cbecause%20%5Ctan%28%5Cpi%2B%5Ctheta%29%3D%5Ctan%20%5Ctheta%5D)

Therefore, the correct option is C.
Answer:
5s^2 - 30st - 7t^2
Step-by-step explanation:
2 , -5 , 1
those are the coefficients (C)