How can I convert from mx+B form to Ax+By=C Form and what website is a good reference for math questions?

My math teacher is a complete bi*** and does not answer any questions. I need to this and many other things that she does not bother to explain in order to pass her class. Any ideas? P.S. this is actually a geometry class that I took so I would not have to take Algebra. Little did I know at the time that geometry uses Algebra. Grrrrrrrrr!!!!!!!!

How can I convert from mx+B form to Ax+By=C Form and what website is a good reference for math questions?
Yes, Geometry is based on algebra, but yea.





Ok First for MX+B, you need to get the slope as X/-Y)





take the X value in for A in AX+BY=C. Then plug the Y value in for B. For c, take the (0,B) part and plug it into the AX+BY part, and the result of that will be your C vale.





I would reccommend purplemath.com
Reply:y = 2/3x + 6 : y = mx + b : original


0 = 2/3x - y + 6 : 0 = mx - y + b : move y to other side


-6 = 2/3 x - y : move b to other side to get -b = mx - y -- this also is a fractional form of C = Ax + By


2/3 x - y = -6 : turn it around to look more like Ax + By = C


2x - 3y = -18 : multiply all by 3 to clear fraction -- and you have this in Ax + By = C form





The fast way :


Swap the y and the number both sides, changing the sign on both as you do : y = 2/3 x + 6 becomes -6 = 2/3 x - y


Flip the equation : 2/3 x - y = -6


Clear the fraction : 2x - 3y = -18
Reply:To change y = mx + b into standard form, let's look at an example:





y = 3x + 5, bring the 3x to the left side by subtracting it





-3x + y = 5, can't lead with a negative, so let's multiply by -1





-1(-3x + y = 5)





3x - y = -5





that's it. You're at a good site right now for asking questions. Also, study the examples in your text book and see if you can find a study partner in your class.