Math help? its algebra. and i forgot everything and i have to finish it by wed. ?

Question

alright. like the slope any y-int?

i needa know how to figure that out and graph it.

here is and example:

y-4= -1/3(x-2)

and

y=3x(squared)

and factoring....

-4x(cubed) - 20x(squared) + 16x

substitution..

4x-4y=12

3x+2y=4

Answer 1

I had tried few online tutoring website and found transwebtutors.com quite interesting,

you may try this one

Answer 2

1. To graph linear equations, always write the equation in y-intercept form:

    y = mx + b where m is the slope and b is the y-intercept.

   So for y - 4 = -1/3 (x - 2), it simplifies to

             y - 4 = (-1/3)x + 2/3

                  y = (-1/3)x + 14/3

So the y-intercept is 14/3 and the slope is -1/3

To graph it, you can just find any two points on the line and connect them. For example, put x = 2 into the equation to get y = 4 and put x = 5 to get y = 3. Your two points are (2,4) and (5,3). Plot them and then connect the dots.

2. For factoring, first look at every term and find something in common. (If all even, then it is obvious that a 2 can be factored out etc.)

For the example, -4x^3 - 20x^2 + 16x

All coefficients are divisible by 4, and all terms have an x, so we can factor out 4x

so -4x^3 - 20x^2 + 16x = 4x(-x^2 - 5x + 4)

We cannot factor any further but be careful when you see quadratics as they are usually factorable in textbook questions.

3. For substitution, you are given two equations. Solve for one variable in one equation and substitute that into another equation. By doing that, you will have an equation that only has one variable and you can solve for it.

4x - 4y = 12 which can be written x - y = 3 (divide by 4)

                                                     x = y + 3 (solve for x)

Now put that into the other equation

3x + 2y = 4

3(y + 3) + 2y = 4          Notice how this equation only has y

3y + 9 + 2y = 4

5y = -5

y = -1

Now that we know y = -1, we can easily solve for x by substituting y = -1 in one of the equations.

3x + 2y = 4

3x + 2(-1) = 4

3x - 2 = 4

3x = 6

x = 2

Therefore, x = 2 and y = -1

Hope that helps.

Answer 3

get the y's by themself

put it into a graphing calculator