The function for the cost of materials to make a biscuit is f(x) = four-fifths x + 4, where x is the number of biscuits. the function for the selling price of those biscuits is g(f( where g(x) = 4x + 5.what is the selling price of the 15 biscuits

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