Lenovo B575e has a poor wireless driver by default, but a proper driver can be installed the next way:
HOW TO: Install Broadcom-STA (wl) driver
In Mint 18 the next way:
lenovo@lenovo-B575e ~ $ inxi -N
Network: Card-1: Realtek RTL8111/8168/8411 PCI Express Gigabit Ethernet Controller
driver: r8169
Card-2: Broadcom BCM4313 802.11bgn Wireless Network Adapter
driver: wlsudo -i
apt-get update
apt-get install module-assistant wireless-tools
echo blacklist brcm80211 >> /etc/modprobe.d/broadcom-sta-common.conf
update-initramfs -u -k $(uname -r)
modprobe -r b44 b43 b43legacy ssb brcm80211
modprobe wl
exit
reboot