well it depend what you do but i would say your house
An example of an everyday problem is Autocorrect while typing and also being In a public area with terrible sanitation.
Sex
An example of heat transfer in everyday life is when you feel the warmth of the sun on your skin.
Give some important of studying mathematics in everyday life?
Unless your "everyday life" involves work in some area of engineering, you won't use matrices in your everyday life.
a toaster
use measure of area
The Egyptian pyramids.
"Can you open this?"
Making packaging for something
Expansion in everyday life is setting achievable goals each day and working to The best of your ability to achieve them
An example of a pure substance in everyday life is distilled water. It consists of only water molecules with no other substances or impurities present.