Please Help me I’m begging you

Which letters from the table represent like terms? a and b b and c a and d b and d

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

Find the distance between (7,-6) and (-3,-9)