I have finally got the Broadcom wifi network card to work--
Broadcom Corporation BCM43142 802.11b/g/n [14e4:4365] (rev 01). This article was very helpful. However, every time I boot the computer, I have to go into terminal and enter the following commands in order to get the wifi working:
sudo modprobe -r b43 ssb wl sudo modprobe wl
How can I connect to the wifi automatically when I boot my computer without having to manually enter the commands above manually every time I boot?