I'm using Linux Mint and every time I use apt-get update in terminal I receive this message.E: Type 'http://dl.google.com/linux/chrome/deb/' is not known on line 1 in source list /etc/apt/sources.list.d/additional-repositories.listE: The list of sources could not be read.I'm a novice with Linux so some help would be appreciated 
apt-get sources could not be read
apt;repository