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Mathematics 18 Online
OpenStudy (anonymous):

HELP! The question says... Write an equation in point-slope form of the line through point J(4,1) with the slope -4. Can anyone HELP QUICK?

OpenStudy (anonymous):

@midhun.madhu1987

OpenStudy (anonymous):

Point slope form (y-y1) = m(x-x1) (x1,y1) =(4,1) m = -4 Put the values and solve

OpenStudy (midhun.madhu1987):

Agree @sangya21

OpenStudy (anonymous):

so, the answer would be 4x+y=15?

OpenStudy (anonymous):

@midhun.madhu1987 @sangya21 @KamiBug

OpenStudy (anonymous):

(y -1) = -4(x-4) ------ Point slope form y -1 = -4x +16

OpenStudy (midhun.madhu1987):

15 or 17?

OpenStudy (anonymous):

I got 15.

OpenStudy (midhun.madhu1987):

y -1 = -4x +16 4x + y = 17

OpenStudy (anonymous):

Agreed @midhun.madhu1987 ;)

OpenStudy (midhun.madhu1987):

ha ha .. lol ;)

OpenStudy (anonymous):

thanks you guys, will give all a medal! can yall help with another?

OpenStudy (anonymous):

Sure

OpenStudy (midhun.madhu1987):

Most importantly.. you understood it?

OpenStudy (anonymous):

Yes, I made the error when I subtracted.

OpenStudy (midhun.madhu1987):

fine... :)

OpenStudy (anonymous):

the other question says, lines a,b,c, and d are in the same plane. line a is parallel to line c. lines b and c are perpendicular to line d. based on this, tell how lines are related. justify your answer.

OpenStudy (anonymous):

Line a || Line c - given Line c perpendicular to Line d thus line d is perpendicular line a line d is perpendicular line b so how is line b related to line a?

OpenStudy (anonymous):

ok.. I'm lost here. so not into geometry ://

OpenStudy (anonymous):

Taking an example if line a is parallel to line b and line b is perpendicular to line c then line c is perpendicular to line a |dw:1415389227959:dw|

OpenStudy (anonymous):

Got it?

OpenStudy (anonymous):

yes, I get it know. so in the question I asked line a and b would be related because they are both parallel to each other?

OpenStudy (anonymous):

|dw:1415389595612:dw| this is the figure of your question and the given points are Line a || Line c - given Line c perpendicular to Line d line d is perpendicular line b so how is line b related to line a? and how is line d related to line a?

OpenStudy (anonymous):

|dw:1415389784071:dw|

OpenStudy (anonymous):

Line a and line d are also perpendicular to each other.

OpenStudy (anonymous):

correct and relation between line a and line b?

OpenStudy (anonymous):

so that means, it means lines a and b are perpendicular to? *fingers crossed I got this right*

OpenStudy (anonymous):

or does it mean they are parallel...

OpenStudy (anonymous):

From fig do you think they are perpendicular?

OpenStudy (anonymous):

b is parallel to a

OpenStudy (anonymous):

ok.. thanks for your help and patience. and excuse my minor slowness. :( lol

OpenStudy (anonymous):

Your welcome. :)

OpenStudy (anonymous):

I'm way better in Civics and English, lol.

OpenStudy (anonymous):

Civics is way above my level. Maths is easy but social is a torture.

OpenStudy (anonymous):

Everyone thinks the same thing. So not true, I find it interesting unlike math sometimes.

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