Answer:
The number of terms in the sequence is 9
Step-by-step explanation:
We want to get the number of terms
Mathematically, we have the formula for the sum of terms in an arithmetic sequence as
![sn = \frac{n}{2} (a + 1)](https://tex.z-dn.net/?f=sn%20%3D%20%20%5Cfrac%7Bn%7D%7B2%7D%20%28a%20%2B%201%29)
a represents the first terms, and i represent the last term
![423 = \frac{n}{2} (15 + 79) \\ \\ 423 \times 2 = 94(n) \\ \\ 94n = 846 \\ \\ n = \frac{846}{94} \\ \\ n = 9](https://tex.z-dn.net/?f=423%20%3D%20%20%5Cfrac%7Bn%7D%7B2%7D%20%2815%20%2B%2079%29%20%5C%5C%20%20%5C%5C%20423%20%5Ctimes%202%20%3D%2094%28n%29%20%5C%5C%20%20%5C%5C%2094n%20%3D%20846%20%5C%5C%20%20%5C%5C%20n%20%3D%20%20%5Cfrac%7B846%7D%7B94%7D%20%20%5C%5C%20%20%5C%5C%20n%20%3D%209)
Answer:
two
Step-by-step explanation:
it has one at 2/3 and one at 1
The pattern is multiply by -4. So to find the next number. Multiply the previous one by -4.
Graph A. The line stays straight, making it linear, and it goes up, making it positive.