An electric iron is plugged into a receptacle that has 110 V present. If the voltage loss from the panel to the receptacle is 6 V the line voltage at the panel is?

To find the line voltage at the panel, you need to add the voltage loss to the voltage at the receptacle. Since the receptacle has 110 V and there is a voltage loss of 6 V, the line voltage at the panel is 110 V + 6 V = 116 V.