Nvidia driver installed but not active


I have Ubuntu 16.04 version with Intel UHD 620 and GeForce Mx 150. I have downloaded and installed cuda but I get command not found for nvidia commands. Addition device driver setting shows nvidia is active and uptodate nvidia 384.130 Still I get this error. If I go to the system details and check for device drivers, intel graphic card is active. Kindly help me in how to activate nvidia driver so I could go ahead with cuda processing.