How are triangles related to the interior angles sum theorem

Given: x + y = 6. if xe (-15, -6, -1), then which of the following sets of ordered pairs are solutions? © {(-15, -21), (-6, -12), (-1, -7)} [(-15, 21), (-6, , 7)} {(-15, 21), (-6, 12), (-1, -7)}

Which of the binomials below is a factor of this trinominal? x^2-13+30

How to choose the sign of the radical in the denominator of the formula for the distance from a point to a line.