You can perform these actions via one of the following way:
The first way
Select the Requests Received tab to see the list of all connection requests sent to you
Click Confirm to accept the request.
Click Ignore to deny the request.
The second way
1. Access the Intranet homepage to see the list of all connection requests sent to you in My Invitations on the left pane.
2. Click the contact name in the list to go his/her profile page.
Select Connect to accept the request.
Click Deny to deny the request.