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
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
Making packaging for something
"Can you open this?"
Table Salt
The Egyptian pyramids.
Expansion in everyday life is setting achievable goals each day and working to The best of your ability to achieve them
Flipping coins.