Respuesta :

a) Complementary angles add up to 90.

30 + x = 90
x = 60

Complement of 30 is 60

b) Supplementary angles add up to 180.

x + 91 = 180
x =  89

Supplement of 91 is 89

Hope this helps :)

Step-by-step explanation:

Angle = 30⁰

Complement = 90 - 30 = 60⁰

Angle = 91⁰

Supplement = 180 - 91 = 89⁰