Answer:
p = 11
Explanation:
Let's start by finding the slope of line CD:

Plug in the given coordinates into the equation:

Parallel lines have the same slope. This means we can plug the slope of line CD in to find p (in this case p is
)...


Cross multiply (multiply numerator of first fraction by denominator of second and vice versa):
Distribute:

Subtract 18 from both sides:

Divide both sides by 6
