Hello could someone help me with one or two of these questions i don’t know, but thank you!

3382-299=3383- ? fill in the blank?

The larger of two number is 4 less than twice the smaller number. the sum is 41. find the numbers

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