SOMEONE ANSWER AND EXPLAIN ILL MARK BRAINLIEST

For question 10, the next 3 sequences are 21, 34, and 55.

Step-by-step explanation: The Fibonacci sequence is where you take the last 2 number of the sequence and add the together to get the next number.

I hope this helps.

Number 9 is, 21 handshakes

Number 10 part a is 21, 34, and 55.

Not sure on part b

Step-by-step explanation:

for b its (t) and c its (d)

step-by-step explanation:

you didn't give me the choices, so i will just give you the graph so you can look at your choices and choose the right one.