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8 votes
8 votes
Determine if the following lines are parallel (never intersect), perpendicular (intersect at a 90 degree angle), intersecting

(intersect at just one point), or coinciding (intersect at all points)?
y = 4x + 12, x + 4y = 32
O perpendicular
O coinciding
O intersecting
O parallel

User Merbin Jo
by
3.3k points

2 Answers

15 votes
15 votes

Final answer:

The given lines represented by the equations y = 4x + 12 and y = (-1/4)x + 8 are perpendicular to each other as their slopes are negative reciprocals.

Step-by-step explanation:

We need to determine if the lines represented by the equations y = 4x + 12 and x + 4y = 32 are parallel, perpendicular, intersecting, or coinciding. To do this, we should first express the second equation in slope-intercept form, just like the first one, which is y = mx + b where m is the slope and b is the y-intercept.



Rewriting the second equation, we get:

  • x + 4y = 32
  • 4y = -x + 32
  • y = (-1/4)x + 8



The line represented by y = 4x + 12 has a slope of 4, and the line represented by y = (-1/4)x + 8 has a slope of -1/4. Since the slopes are negative reciprocals of each other, the lines are perpendicular and they intersect at a 90 degree angle.

User Priyanshu Jindal
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3.5k points
11 votes
11 votes
You have to put the same number on it
User Andrey Tagaew
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2.9k points