As a new flight dispatcher for a cargo airline, you are reviewing the formulas used to estimate delivery times. According to your training manual, when an aircraft encounters a tailwind, how do you recall the formula for its effective ground speed if the aircraft's speed in still air is $r$ and the wind speed is $w$?

As a trainee in a flight operations center, you must be able to quickly identify the variables and terms used in flight speed calculations. Match each aviation term or algebraic symbol with its correct description regarding wind currents.

A flight operations trainee is reviewing how wind currents affect aircraft performance. True or False: A tailwind is defined as a wind current that blows in the same direction as an airplane's flight path, resulting in an increase to the aircraft's actual ground speed.

Aviation Logistics: Defining Wind Assistance

In aviation navigation and flight planning, when an airplane's speed in still air is represented by $r$ and it is assisted by a wind of speed $w$ blowing in the same direction as the flight path, the mathematical expression for the effective ground speed is ____.