80 points? Please help me I need too pick up my grade .

What is the value of the expression 9+n/3-6 when n = 12? 1. 5. 7. 12.

Which statements are true? check all that apply. the line x = 0 is perpendicular to the line y = –3. all lines that are parallel to the y-axis are vertical lines. all lines that are perpendicular to the x-axis have a slope of 0. the equation of the line parallel to the x-axis that passes through the point (2, –6) is x = 2. the equation of the line perpendicular to the y-axis that passes through the point (–5, 1) is y = 1.

State one method by which you can recognize a perfect square trinomial.