Assuming the sequence goes on like this 11,-33,99,-297,891,...,
its general formula is

So, the 9th term is
Answer:

Step-by-step explanation:
The base function is given as

This graph opens up and has its vertex at the origin.
When we shift the graph of this function down by 9 units, its vertex is now at (0,-9)
The equation of this new graph is

Answer: 0.4
Step-by-step explanation:
Answer: 53
Step-by-step explanation: To get the answer we have to use the pythagorean theorem.
a² + b² = c²
28² + 45² = c²
784 + 2025 = c²
2809 = c²

c = 53
I hope this helps!