Basic Geometry Questions?

Question

Halp. I need to find some complements of these angles of the following:

a. 138

b. n (my answer...90-n??)

c. 90-n

d. 45+n

Answer 1

A pair of angles is complementary if the sum of their measures add up to 90

so right away you know that a is not it

b, doesnt really tell you what n could be

c is correct

and d is close but no because we dont know what n would be