Answer:
1) 22 seven seaters
2) 4 more students
Step-by-step explanation:
![\text{lcm}(20,30,40)=120](https://tex.z-dn.net/?f=%5Ctext%7Blcm%7D%2820%2C30%2C40%29%3D120)
So, they'll ring together again in 120 minutes.
120 min = 2 h
9:45 + 2:00 =
11:45
600 * 0.85 (the way to work out 85% of something) = 510 flights on time
70 for the first one I can’t figure out the rest I’m so sorry
G(f(1))
Plug 1 into the f function.
f(1) = 2(1) + 6
f(1) = 8
Now evaluate g(8)
g(8) = 8^2 + 6
g(8) = 70