Question 171331
I've asked for help several times and have not gotten a response, is there any specific reason why my questions are being ignored. 
Write an equation fo the line passing through the given points. 
(3,-12) and (-4,2) 
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There are 2 ways to solve this (maybe more, but I know 2).
Using determinants:
|x   y 1|
|-4  2 1| = 0
|3 -12 1|
x*(2-(-12) -y*(-4-3) + 48-6 = 0
14x + 7y = -42
2x + y = -6
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The slope method:
1st, find the slope, m
m = (diff in y)/(diff in x)
m = (-12 -2)/(3 - (-4))
m = -14/7 = -2
Then, use either point
y-y1 = m*(x-x1)
y-2 = -2*(x+4)
y-2 = -2x -8
y = -2x -6  (slope-intercept form)
2x + y = -6 (standard form)
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I don't know which problems are yours, but the reason I ignore problems is that they have typos, or for some reason don't make any sense.  I log on, and see 400 problems to choose from.  I won't waste my time on the ones that are just gibberish, or that have ambiguities.  
For example,  "square root of 3y+5=4"
What about it? Solve for y?  Is it {{{sqrt(3y) + 5 = 4}}}, or {{{sqrt(3y+5) = 4}}}?
In other cases, there's just a textbook reference, and some page numbers and problem numbers.  Am I supposed to buy all the textbooks that are in use?
How about this one:
How do I solve tan@+sec@=1 ?