Liam and Noel built a fence for a landlord. Liam built 30 m per hour, and Noel built 5 m less than him per hour. They built
together for 3 hours, and then Noel finished building the rest of
the fence alone. Noel worked 7 hours in all. Find the total
length of the fences.

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