Which of the following is the correct expansion of (y + 1)(y2 + 2y + 3)? y3 + 3y2 + 5y + 3 y3 + y2 + y + 3 y3 + 6y2 + 5y + 9 y3 + 5y2 + 6y + 3

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