Answer:
b
Step-by-step explanation:
as i guess it most be b though I doubt it
5- 1:1.5
6- 24
18
The perimeter is length plus width plus length plus width.
12+18+12+18=60
1.) n + 16
2.) 2n - 8
3.) n - 20
4.) (n/7) + 6
5.) b + 12
6.) 9c
7.) f - 13