Step-by-step explanation:
15t + 30 = 20t | -15t
30 = 5t
t = 30/5 = 6
20 + 5t = -6t + 86 | + 6t
20 + 11t = 86 | -20
11t = 66
t = 6
18t + 20 = 24t + 50 | -18t
20 = 6t + 50 | -50
-30 = 6t
t = -30/6 = -5
18t - 2 = 10t + 54 | -10t
8t - 2 = 54 | +2
8t = 56
t = 56/8 = 7
7t - 5 = 15t + 91 | -7t
-5 = 8t + 91 | -91
-96 = 8t
t = -96/8 = -12
Answer:
the thrid one
Step-by-step explanation:
bc its all correct like i went over all of it and its correct glad to help bro!!!!!
Answer:
None really look like a solution. I mean, that's what I think, honestly.
What you have to do is divide the number by one tenth
Answer = 796.2
I think you mean,
![\sum_{i=1}^{\infty}(7i+22)](https://tex.z-dn.net/?f=%5Csum_%7Bi%3D1%7D%5E%7B%5Cinfty%7D%287i%2B22%29)
You can use the usual formula,
![S_{k}=\frac{k}{2}(a_1+a_k)](https://tex.z-dn.net/?f=S_%7Bk%7D%3D%5Cfrac%7Bk%7D%7B2%7D%28a_1%2Ba_k%29)
That in this case is,
![S_{11}=\frac{11}{2}(29+99)=704](https://tex.z-dn.net/?f=S_%7B11%7D%3D%5Cfrac%7B11%7D%7B2%7D%2829%2B99%29%3D704)
Where I have used,