It's not clear what you're supposed to do, but I would guess that you're asked to find a certain term in the sequence.
Given
![\begin{cases}t_1=9\\t_n=t_{n-1}-4&\text{for }n>1\end{cases}](https://tex.z-dn.net/?f=%5Cbegin%7Bcases%7Dt_1%3D9%5C%5Ct_n%3Dt_%7Bn-1%7D-4%26%5Ctext%7Bfor%20%7Dn%3E1%5Cend%7Bcases%7D)
you can do that by solving for
![t_n](https://tex.z-dn.net/?f=t_n)
explicitly.
![t_n=t_{n-1}-4=t_{n-2}-2\times4=t_{n-3}-3\times4=\cdots=t_1-(n-1)\times4](https://tex.z-dn.net/?f=t_n%3Dt_%7Bn-1%7D-4%3Dt_%7Bn-2%7D-2%5Ctimes4%3Dt_%7Bn-3%7D-3%5Ctimes4%3D%5Ccdots%3Dt_1-%28n-1%29%5Ctimes4)
So the explicit formula for the
![n](https://tex.z-dn.net/?f=n)
th term is
Answer:
yz
Step-by-step explanation:
........
........
answer is YZ
Answer:
Area of the wall without the doorway = 67.5 - 21 = 46.5 ![feet^{2}](https://tex.z-dn.net/?f=feet%5E%7B2%7D)
Step-by-step explanation:
i) let length of smaller side of trapezoidal wall, a = 22 feet
ii) let length of longer side of trapezoidal wall, b = 23 feet
iii) height of trapezoidal wall, h = 3 feet
iv) area of trapezoidal wall =
=
= 22.5
3 = 67.5 ![feet^{2}](https://tex.z-dn.net/?f=feet%5E%7B2%7D)
v) area of door = 7
3 = 21 ![feet^{2}](https://tex.z-dn.net/?f=feet%5E%7B2%7D)
vi) Area of the wall without the doorway = 67.5 - 21 = 46.5 ![feet^{2}](https://tex.z-dn.net/?f=feet%5E%7B2%7D)
Can we have the answer choices? I believe it would be 100° but the answer choices would really help :)