The next larger whole number is 27 .
The next smaller whole number is 26 .
26.55 is closer to 27 than it is to 26 .
So the nearest whole number is 27 .
Theyre both divisible by 3
15n-18= 3(5n - 6)
9x squared - 6x - 6x + 4
9x squared - 12x + 4
C.....hlj so yeah because it shows it on the diagram