Math Is Fun Forum

roger wrote:

write an equation in standard form that:

1)   passes though (7,2) and parallel to x+y=6

and

2)  passes through (1,9) and is perpendicular to 2x-5y=8

Have you made any attempt at these questions? How far have you got?

Both of these need to be in the form y = mx + c (or whatever symbols you're using for "gradient" and "y-intersection" - m and c are what I'm using, respectively).

So here are two further sub-questions that will get you started on the first question:

i) What is the gradient (m in the equation above) of the first line?

If you can answer this, you'll have the m in the equation. Then:

ii) What does c have to be so that y = 2 when x = 7?

Get back with any thoughts/answers/guesses (:P) you have for these.

1+22, 2+21, 3+20, ... no?

二十三 = 23 (in Chinese)

is 80%1920=24     

                                            - 13kayduz

elementry??? whats a elementry in scotland we call it primary but for short i'm in p7 or as you might call it a "grade" i saw it on tv