Consider isosceles trapezoid ABCD where m(A) = 80, the m(B) = 100. A and B are supplementary, but they do not make a straight line.
Similarly, in https://brilliant.org/practice/complementary-and-supplementary-angles/?p=4 angle A and B are supplementary, but they don't necessarily make a straight line. In fact, to be a straight line, A and B would have to be the same point. So there isn't enough information to determine.