For the regular sequence 1, 2, 3, ...,
![n](https://tex.z-dn.net/?f=n)
, then sum is
![\frac{n(n+1)}{2}](https://tex.z-dn.net/?f=%5Cfrac%7Bn%28n%2B1%29%7D%7B2%7D)
If we multiply each number by 7 (7, 14, 21, ...), then the sum is
![\frac{7n(n+1)}{2}](https://tex.z-dn.net/?f=%5Cfrac%7B7n%28n%2B1%29%7D%7B2%7D)
and if we add 1 to each number (8, 15, 22, ...) then the sum is
![\frac{7n(n+1)}{2}+n](https://tex.z-dn.net/?f=%5Cfrac%7B7n%28n%2B1%29%7D%7B2%7D%2Bn)
We have
![n=26](https://tex.z-dn.net/?f=n%3D26)
terms, so the sum is:
![\frac{7(26)(27)}{2}+26](https://tex.z-dn.net/?f=%5Cfrac%7B7%2826%29%2827%29%7D%7B2%7D%2B26)
![=7(13)(27)+26](https://tex.z-dn.net/?f=%3D7%2813%29%2827%29%2B26)
![=91(27)+26](https://tex.z-dn.net/?f=%3D91%2827%29%2B26)
![=2457+26](https://tex.z-dn.net/?f=%3D2457%2B26)
Answer:
1.82
Step-by-step explanation:
= 1
= 1.82
Remember the order of operations. The first step in this problem will be to solve the exponent.
Take (2x)^3. Remember that since there are parentheses around 2x, that means you have to cube 2 and x.
(2x)^3 = 2^3 * x^3 = 8x^3
Now multiply that answer by 4 to finish simplifying.
8x^3 * 4 = 32 x^3
Your answer should be: 32x^3
Answer:
1500
Step-by-step explanation:
1/4t=500lbs so 500x3=1500