Whats the answer i ahev been trying for so long

Given that ot =5, xt=12, and ox= 13 is xy tangent to circle o at t? explain.

Which value of m will create a system of parallel lines with no solution? y = mx - 6 8x - 4y = 12

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