Select the correct answer. - 12 - 10.5 + 1257 What are the roots of the quadratic equation y = ОА. I = -5 + 101 OB. I = 5 7 5/6 O C. r = 5 – 101 OD. r = -5 + 56​

What is the next step in the given proof? choose the most logical approach. a. statement: m 1 + m 2 + 2(m 3) = 180° reason: angle addition b. statement: m 1 + m 3 = m 2 + m 3 reason: transitive property of equality c. statement: m 1 = m 2 reason: subtraction property of equality d. statement: m 1 + m 2 = m 2 + m 3 reason: substitution property of equality e. statement: 2(m 1) = m 2 + m 3 reason: substitution property of equality