Please please answer and dont put any links :)

What kinds of numbers make up the set of numbers called the real numbers? give examples when you explain a number type. there are a limited set of types of numbers, but an unlimited number of examples of these numbers.

For f(x)=2x+3 and g(x)=x^2- 8 find (f+g) (x)

Solve the system of equations y= 3/2 - 1, -x+ y =-3