Answer:
24.351
Step-by-step explanation:
It’s b , also isn’t ur username smart guy
Answer:
A
Step-by-step explanation:
2/8 because there are 8 in total but only 2 are colored.
Answer:
234
Step-by-step explanation:
We want to find the summation from n = 2 to n = 10 of the equation -4 + 5n.
We can use the summation formula:
, where a1 is the first term,
is the last term, and n is the number of terms
Here, we can say the first term occurs when n = 2:
-4 + 5n
-4 + 5 * 2 = -4 + 10 = 6
The last term will be when n = 10:
-4 + 5n
-4 + 5 * 10 = -4 + 50 = 46
The number of terms is just 10 - 2 + 1 = 9 terms.
Substitute these in:
![S=\frac{(a_1+a_n)*n}{2}](https://tex.z-dn.net/?f=S%3D%5Cfrac%7B%28a_1%2Ba_n%29%2An%7D%7B2%7D)
![S=\frac{(6+46)*9}{2}=\frac{468}{2} =234](https://tex.z-dn.net/?f=S%3D%5Cfrac%7B%286%2B46%29%2A9%7D%7B2%7D%3D%5Cfrac%7B468%7D%7B2%7D%20%3D234)
Thus, the answer is 234.