Answer:
![a _{n} = a _{1} + (n - 1)d \\ a _{41} = - 534 \\ a _{54} = - 708 \\ a _{41} = a _{1} + (41 - 1)d = - 534 \\ a _{1} + 40d = - 534 \: \: ...(1)\\ a _{54} = a _{1} + (54 - 1)d =- 708 \\ a _{1} + 53d = - 708 \: \: ...(2)](https://tex.z-dn.net/?f=a%20_%7Bn%7D%20%3D%20a%20_%7B1%7D%20%2B%20%28n%20-%201%29d%20%5C%5C%20a%20_%7B41%7D%20%3D%20%20-%20534%20%5C%5C%20a%20_%7B54%7D%20%3D%20%20-%20708%20%5C%5C%20%20a%20_%7B41%7D%20%3D%20%20a%20_%7B1%7D%20%2B%20%2841%20-%201%29d%20%3D%20-%20534%20%20%5C%5C%20%20a%20_%7B1%7D%20%2B%2040d%20%3D%20-%20534%20%5C%3A%20%20%5C%3A%20...%281%29%5C%5C%20a%20_%7B54%7D%20%3D%20%20a%20_%7B1%7D%20%2B%20%2854%20-%201%29d%20%3D-%20708%20%5C%5C%20a%20_%7B1%7D%20%2B%2053d%20%3D%20-%20708%20%5C%3A%20%20%5C%3A%20...%282%29)
Try to solve the similtanious equation to find the first term and the common difference, then use that information to figure out the 80th term... Update me if you need further help ...
Answer: A. 14
Step-by-step explanation:
If e=9 and c=5 you would replace e+c with those
9+5=14
9514 1404 393
Answer:
Step-by-step explanation:
Consecutive interior angles are supplementary.
(x -20)° +(4x +15)° = 180°
5x = 185 . . . . . . . . . . . . . . divide by °, add 5
x = 37 . . . . . . . . . . . . divide by 5
__
74° +(5y -4)° = 180°
5y = 110 . . . . . . . . . . . divide by °, subtract 70
y = 22 . . . . . . . . . . divide by 5
19-25=-6 that is your answer