Answer:
k = 14
Step-by-step explanation:
k = 14 because if you isolatethe variable by dividing each side by factor that dosent contain the variable
Sum is
![S_{n}=\frac{a_{1}(1-r^{n})}{1-r}](https://tex.z-dn.net/?f=%20S_%7Bn%7D%3D%5Cfrac%7Ba_%7B1%7D%281-r%5E%7Bn%7D%29%7D%7B1-r%7D%20)
r=common ratio
a1=first term
it looks like 2^0=1 is the first term aka a1
it goes to the 9th term (2^9)
sub
![S_{9}=\frac{1(1-(2)^{9})}{1-2}](https://tex.z-dn.net/?f=%20S_%7B9%7D%3D%5Cfrac%7B1%281-%282%29%5E%7B9%7D%29%7D%7B1-2%7D%20)
![S_{9}=\frac{1-512}{-1}](https://tex.z-dn.net/?f=%20S_%7B9%7D%3D%5Cfrac%7B1-512%7D%7B-1%7D%20)
![S_{9}=\frac{-511}{-1}](https://tex.z-dn.net/?f=%20S_%7B9%7D%3D%5Cfrac%7B-511%7D%7B-1%7D%20)
6.5 = - 1/2(5) + 9
6.5 = - 2.5 + 9 which is the same as 6.5 = 9 - 2.5
6.5 = 6.5
So yes, this ordered pair IS a solution.
Answer:
5 dollar intervals
Step-by-step explanation: