B. is the Correct Answer, Hope It Helps!
Answer:
19/30
Step-by-step explanation:
1/5 + 2/15 + 3/10
We need the LCD of 5, 15, and 10.
LCD = 30
1/5 + 2/15 + 3/10 =
= 6/30 + 4/30 + 9/30
= 19/30
Answer: 19/30
For my answer i got y = x - 18
Given:
The sequence is
436, 218, 109, 54.5, 27.25,...
To find:
The explicit formula for the given sequence.
Solution:
We have,
436, 218, 109, 54.5, 27.25,...
It is a GP because the two consecutive terms have common ratio.
Here,
First term : a=436
Common ratio : d = ![\dfrac{218}{436}](https://tex.z-dn.net/?f=%5Cdfrac%7B218%7D%7B436%7D)
= ![\dfrac{1}{2}](https://tex.z-dn.net/?f=%5Cdfrac%7B1%7D%7B2%7D)
= ![0.5](https://tex.z-dn.net/?f=0.5)
Now, the explicit formula for a GP is
![g_n=ar^{(n-1)}](https://tex.z-dn.net/?f=g_n%3Dar%5E%7B%28n-1%29%7D)
Where, a is the first term and r is the common ratio.
Putting a=436 and r=0.5, we get
![g_n=436(0.5)^{(n-1)}](https://tex.z-dn.net/?f=g_n%3D436%280.5%29%5E%7B%28n-1%29%7D)
Therefore, the correct option is c.
Is the answer D i might be wrong sorry if i am