Hello! Our answer is 152 degrees.
We are asked to find the supplement of 28.
Recall that supplementary angles add up 180 degrees.
So to find the missing angle, we are going to set up an equation, where b is the angle that we need to find.
So, our equation is:
x + 28 = 180
To solve, subtract 28 from both sides:
x = 152
x = 152 degrees