Final answer:
When Shereen landed in Madrid, the temperature was 20 degrees, which was calculated by adding the temperature increase of 25 degrees to the initial temperature of -5 degrees.
Step-by-step explanation:
The question asks us to calculate the temperature when Shereen landed in Madrid after the temperature was 25 degrees hotter than when she left London at -5 degrees. To find the temperature in Madrid, we simply need to add the increase in temperature to the initial temperature.
Initial temperature in London: -5 degrees
Increase in temperature: +25 degrees
To calculate the final temperature:
-5 degrees + 25 degrees = 20 degrees
Therefore, the temperature when Shereen landed in Madrid was 20 degrees.