the solid line passes through (0,-3) and (0,9)
dotted line passes through (0,-3) and (0,-1)
see attached sketch
You do
-26
-4
---
-30
5n=-30 so...
-30/5=-6
Therefore
n=-6
When adding fractions you need to get common denominators then you multiply too times bottom and then boom add and there you go
18sqrt(15)
This has to be at least 20 characters long so yeaaaa