Help! math quiz due in 15 mins

Use the elimination method to find the solution to the system of equations. 2x - 3y = -9 -x + 3y = 6

(x-5)1/2+5=2 what is possible solution of this equation

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