Respuesta :

the supplement is 120 degrees and its complement is 30 degrees.
The working out is a bit long, if you want details, comment so.
When two angles are supplement it means they add up to 180.

t and 4t are the supplements.

t + 4t = 180

5t = 180

t =180/5 = 36

t = 36,                4t = 4*36 = 144

So the angles are 36 and 144 degrees.