apt - Apitude Doesn't work, Unmet Dependancies error for any Program

I'm having some problem with aptitude. I can't install anything -- I get an unmet dependancies error. I don't know how to interpret it.

yoshi@goOutMore:~/Dropbox/work/class_AMS261/summer17/sylabus$ sudo apt-get install fortune
Reading package lists... Done
Building dependency tree       
Reading state information... Done
Note, selecting 'fortune-mod' instead of 'fortune'
You might want to run 'apt-get -f install' to correct these:
The following packages have unmet dependencies:
 fortune-mod : Depends: librecode0 (>= 3.6) but it is not going to be installed
               Recommends: fortunes-min but it is not going to be installed or
                           fortune-cookie-db

 linux-image-extra-4.13.0-37-generic : Depends: linux-image-4.13.0-37-generic but it is not going to be installed
 linux-image-generic-hwe-16.04 : Depends: linux-image-4.13.0-37-generic but it is not going to be installed
E: Unmet dependencies. Try 'apt-get -f install' with no packages (or specify a solution). 

Can anyone interpret these? Also how do I resolve them? thanks!