
get rid of -2 by subtracting it from 21

Now you get your answer

Hope this helps! :)
Answer:
6,true 7,false 8,false 9,true 10,true
Step-by-step explanation:
Answer:
x = 9
Step-by-step explanation:
Answer:
When the heat is raised (for instance, as water is boiled), the higher kinetic energy of the water molecules causes the hydrogen bonds to break completely and allows water molecules to escape into the air as gas. We observe this gas as water vapor or steam.
Step-by-step explanation: