Answer:
x=170
The question is asking you to add them together to get your unknown number
the room will either cool down or warm up the water until it is the same temperature as the room around it.
B)Buenos Aires was the city near the epicenter :)
Density = mass / volume
Density = (45g) / (9 [volume units])
Density = 5g / [volume unit]
There was no specification on the units of volume. However, whatever it may be, just replace the square brackets with the value and your units will be correct.
The answer would be A, 100g since it’s equal