1st one . . . . . 1
2nd one . . . . . 3
3rd one . . . . . 5
4th one . . . . . 7
5th one . . . . . 9
.
.
9th one . . . . . 17
It looks to me like the 'n'th odd number is always (2n - 1) .
In that case, the 200th odd number is (2x200 - 1) = <em>399 </em>.
I'll let you check it out and see if that's correct.
Answer:
19. - 4/11
21. 14
Step-by-step explanation:
Im sorry but i can't solve 20
Answer:
![C = 69.1^\circ](https://tex.z-dn.net/?f=%20C%20%3D%2069.1%5E%5Ccirc%20)
Step-by-step explanation:
![c^2 = a^2 + b^2 - 2ab\cos C](https://tex.z-dn.net/?f=%20c%5E2%20%3D%20a%5E2%20%2B%20b%5E2%20-%202ab%5Ccos%20C%20)
![a = 17 ft; ~b = 8 ft; ~c = 16 ft](https://tex.z-dn.net/?f=%20a%20%3D%2017%20ft%3B%20~b%20%3D%208%20ft%3B%20~c%20%3D%2016%20ft%20)
![16^2 = 17^2 + 8^2 - 2(17)(8)\cos C](https://tex.z-dn.net/?f=%2016%5E2%20%3D%2017%5E2%20%2B%208%5E2%20-%202%2817%29%288%29%5Ccos%20C%20)
![256 = 289 + 64 - 272\cos C](https://tex.z-dn.net/?f=%20256%20%3D%20289%20%2B%2064%20-%20272%5Ccos%20C%20)
![-97 = -272 \cos C](https://tex.z-dn.net/?f=%20-97%20%3D%20-272%20%5Ccos%20C%20)
![\cos C = \dfrac{-97}{-272}](https://tex.z-dn.net/?f=%20%5Ccos%20C%20%3D%20%5Cdfrac%7B-97%7D%7B-272%7D%20)
![\cos C = 0.3566](https://tex.z-dn.net/?f=%20%5Ccos%20C%20%3D%200.3566%20)
![C = \cos^{-1} 0.3566](https://tex.z-dn.net/?f=%20C%20%3D%20%5Ccos%5E%7B-1%7D%200.3566%20)
![C = 69.1^\circ](https://tex.z-dn.net/?f=%20C%20%3D%2069.1%5E%5Ccirc%20)