What is an algebraic expression for the word phrase 10 more than a number f is equal or greater than a number g

Answer 1

Sometimes more than means greater than and sometimes it means in addition to. In this case you want 10 more than f so that is f + 10 or 10 + f. Equal or greater than is the same as greater than or equal to.

Answer 2

In symbols:

f + 10 ≥ g