Posted by kelli on Wednesday, September 17, 2008 at 6:46pm.
1. The line x = 5 is vertical, so the slope of the parallel line is infinity. The value of x must always be 4.
x = 4 is the answer.
2. The slope of the x=8 (vertical) line is infinity, so the slope of the perpendicular line must be zero. That means that y = 4, regardless of x. Therefore y = 4 is the answer.
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