Geometry Homework

J

jay_raye

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Jan 16, 2011
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What is the equation of a line that passes through the point (–2, 8) and is perpendicular to the line represented by this equation?

5x ? 2y = ?10

I don't even know where to begin with this. Can someone please help me learn more about slope-intercept involving parallel and perpendicular lines, please?
 
If two lines are perpendicular, then the product of their slopes equals -1.
If two lines are parallel , then their slopes are equal.
 
Aladdin said:
If two lines are perpendicular, then the product of their slopes equals -1.
If two lines are parallel , then their slopes are equal.
Click to expand...

Okay, so how do I find out if the aforementioned points reside in the line? (-2, 8)
 
Are you familiar with this equation: y = mx + b?
If not, you need classroom help, which is not available here.
 
jay_raye said:
5x ? 2y = ?10

I don't even know where to begin with this.

The first step is to solve the equation above for y.
Click to expand...

If you cannot solve this equation for y, then I agree with Denis.

If you need more help here, you must ask specific questions about what you do not understand. I mean, why are you stuck?

Thank you. 8-)

 
sorry, but could the answer be y = 5x/2 + 5 ?

See 5x - 2y = -10
-5x -5x

-2y = -10 -5x

Divide by 2 on both sides. this leaves you with y (which should be positive)
 
jay_raye said:
how do I find out if the aforementioned points reside in the line?

There is only one aforementioned point.

You're not asked to confirm that it lies on the perpendicular line; they TOLD you that it does.

What are you currently trying to do? Did you find the requested equation, and now you're attempting to check that it passes through the given point? I do not understand why you're asking about the given point.
Click to expand...

This tutoring will go much smoother, if you start showing your work or explaining what's on your mind. 8-)



MY EDITS: Fixed adjective typo; requested work/explanation
 
Well then, please let jay_raye ask the questions in this thread.
Otherwise, it'll get too confusing.
 
Psychguy98 said:
sorry

You should be. :wink:


could the answer be y = 5x/2 + 5

Not the answer to the exercise, but that result is correct for solving the given equation for y.
Click to expand...

Psychguy98, please stick to your own threads. I think that you have enough on your plate already.

 
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