Answer:
the supplementary angles are 54° and 126°
Step-by-step explanation:
let the two supplementary angles be x and y
since the sum of supplementary angles is 180°
x =3/10*180°
x =3*18
x =54°
since x is equal to 54°
y =180° - 54°
y = 126°
OR
y =7/10*180°
y =7*18
y =126°
I hope this was helpful
