Tres características funcionales de algebra

Which of the following answers is 5/25 simplified? 1/5 5/5 2/5 1/25

Add the two expressions 3.8b - 7 and 2.9b + 9 enter your answer in simplified form

The domain of a function can be represented by which one of the following options? o a. a set of output values o b. a set of f(x) values o c. a set of input values o d. a set of both input and output values