For the graph x = 12 find the slope of a line that is perpendicular to it and the slope of a line parallel to it. explain your answer with two or more sentences

x=12 is a vertical line parallel to y axis. It passes through the point x=12. The slope of a line parallel to the y -axis has a slope that is undefined.

x=12 will have undefined slope. Any line perpendicular to x=12 will become parallel to x axis and will have slope =0.

Parallel lines have same slope. Any line parallel to x=12 will have undefined slope.

The line perpendicular to x = 12 will have a slope of 0 and a line parallel will have an undefined slope.

Hope this helps!

for b its (t) and c its (d)

step-by-step explanation:

x = -3

y = -18

step-by-step explanation:

to solve by substitution, substitute one variable and solve for the other. then substitute again to find the remaining variable.

x-1/3(3x-9) = -3 since y=3x-9 substittute y.

x-1/3(3x-9)=-3

x + x +3 = -3

2x+3=-3

2x+3-3= -3-3

2x=-6

x=-3

substitute again into y=3x-9

y=3(-3)-9

y=-9-9

y=-18