Tony started his math project at 1 : 57 p. M. 1:57 p. M.1, colon, 57, start text, space, p, point, m, point, end text and finished the project 80 8080 minutes later. Tony has band practice at 4 : 00 p. M. 4:00 p. M.4, colon, 00, start text, space, p, point, m, point, end text How much time did Tony have between the end of the project and the beginning of band practice? minutes

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