Help with math problem

[Snakeseye0]

The line, l1, passing through (1,3) and (-2,7) is perpendicular to the line passing through points (4,b) and (8,-1)

-Find b

-Find the equation in slope-intercept form of the line passing through (4,b) and the midpoint of l1.

[Jonnusthegreat]

Google Slope

[Deletedaccount1]

are you in like algebra 1

[Bombino]

Use google, youtube, find oither math-help websites. Putting time into doing that will help you now and in the future far more than figuring out that problem.

[Mercadi]

Drawing this graph would probably have taken you less time than posting here.

[Snakeseye0]

Use google, youtube, find oither math-help websites. Putting time into doing that will help you now and in the future far more than figuring out that problem.

I tried using google already. I don't even know how to set it up.

[Jonnusthegreat]

Perhaps you should get an F on this assignment to realize how behind you are. Do you not even know how to graph points? Search that instead.

[TEHPALLYTANK]

I tried using google already. I don't even know how to set it up.

Draw a graph. I assume you have access to paper, a rule and something to write with.

[Snakeseye0]

Draw a graph.

I can't find any guide that tells me how to find b. How do I find a letter?

[TEHPALLYTANK]

I can't find any guide that tells me how to find b. How do I find a letter?

Google perpendicular, since apparently you don't know what that means.

[Snakeseye0]

plz anyone? help?

[A Chozo]

GRAPHIC STEP:

-Get a sheet of paper
-Draw a cross with a ruler and a pencil
-Set up a coordinate system
-Do some markings on the cross (example: On one of the sides of the X or Y axis: 1, 2, 3.... then, at the other side of the same axis: -1, -2, -3...)
-Draw and intersect some lines with a pencil
-Mark all the points and draw all the lines you know.

You'll then probably discover where b is when you get a more solid view of this.

...I can't help with the second question because it has been almost 3 years since I did this kind of math and I forgot it, and I can't explain the first part better because of English problems D:

[Osoroshii]

I'm reasonably sure this is the correct answer.

[Garnier Fructis]

I can't find any guide that tells me how to find b. How do I find a letter?

Now I'm not trying to be condescending or anything, but the way you phrased this question has got me wondering: Do you know that "b" represents a number and that your goal is to find the number that b represents?

[Snakeseye0]

Now I'm not trying to be condescending or anything, but the way you phrased this question has got me wondering: Do you know that "b" represents a number and that your goal is to find the number that b represents?

Oh I see now.

[Mystrome]

Find the equation in slope-intercept form of the line passing through (4,b) and the midpoint of l1.

Out of curiousity, since google translate doesn't seem to do the trick, does this mean they want you to give the formulas for both lines and work out where they intersect, or simply the (n) in a formula like this: y = (n)x + z ?

[keishton]

Perpendicular brah just think of gradients when perpendicular.
1. find gradient of line (1,3) and (-2,7) = m (rise over run u know?)
2. perpendicular gradient = -1/m
3. same thing with (4,b) and (8,-1) plug -1/m then find b
4. find mid point on the first line so add the x and y coords and divide it by 2.
5. find new line with the (4,b) and the midpoint

PS: wolfram alpha is your friend

[Ulfhedinn]

Oh I see now.

If you are not trolling then you need to talk with your math teacher because he or she is an idiot.

[Deleted]

y = mx + c

[Snakeseye0]

Perpendicular brah just think of gradients when perpendicular.
1. find gradient of line (1,3) and (-2,7) = m (rise over run u know?)
2. perpendicular gradient = -1/m
3. same thing with (4,b) and (8,-1) plug -1/m then find b
4. im sure you know how to find the line.

PS: wolfram alpha is your friend

So I take 4/-3 and -b/4 and graph it to find b?