If m<1 + <2 = 180 and m<2+ m<3 = 180, then <1 = < 3 By what?

• Addition Property of Equality
• Angle Addition Postulate
• Supplements Theorem
• Transitive Property of Equality

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)}

The lengths of two sides of a right triangle are given. find the length of the third side. round to the nearest tenth if necessary. a) y = 12/5x + 39/5 b) y = 5/12x + 5/39 c) y = 12/5x - 39/5 d) y = 5/12x - 5/39

The anwser cause i do not understand just plez