What is the product of (k+4)(3k-6) sorry i don't understand this question and i need

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

Percent increase and decrease. original number: 45 new number: 18

Identify this conic section. x2 - y2 = 16 o line circle ellipse parabola hyperbola