Question

n/a

Answer 1

http://www.revisesmart.co.uk/maths/core-4/vector-equation-of-a-line.html

Answer 2

its still not helping me the link you showed me

Answer 3

just cant get it right
:(

Answer 4

\[\left[\begin{matrix}a1 & b1 \\ a2 & b2\end{matrix}\right]\left(\begin{matrix}x \\y\end{matrix}\right)=\left(\begin{matrix}c1 \\ c2\end{matrix}\right)\]
a1, b1 are the coefficients of x,y in the first and a2,b2 in the second equation. c1 is the constant term in the first and c2 in the second.
ok?

Answer 5

sorry, a1 is the coefficient of y and b1 is the coefficient of x. same for a2 and b2 in the second equation.
Got_it?

Answer 6

where did you get the a1 and b1 from? still dont get it :(((

Answer 7

The equations can be written as
y+x=1
y-2x=1

in matrix form
\[\left[\begin{matrix}1 & 1 \\ 1 & -2\end{matrix}\right]\left(\begin{matrix}y \\ x\end{matrix}\right)=\left(\begin{matrix}1 \\ 1\end{matrix}\right)\]

Answer 8

It is a general form.
If a1x+b1y=c1 and a2x+b2y=c2 are two linear equations, a1,b1 are the coefficients of x and y in the first equation and a2,b2 in the second..
The corresponding equations:
x+y=1
y-2x=1
What are the values of a1,b1 and a2,b2 now?

Answer 9

write the co-eff of y in 1 column of the matrix and the co-eff of x in the very next column of the same matrix. so now u have the first matrix. The next matrix will hav e 1 column of y and x. these two matrices after multiplication will another matrix of 1 column having the constants as depicted by R.H.S of the first two equations.

Answer 10

@ mani this is what this question asked only to gave two straight lines

Answer 11

@ scsam i did similar to your one you just showed. wasent sure if i was right but seems i was thanks for your help

Answer 12

@bhysen Anytime :)

Answer 13

now is asking for this: Find the inverse of the 2-by-2 matrix A obtained above:

Answer 14

2-by-2 Matrix of A

Answer 15

the inverse of a 2x2 is simple enough if you recall the pattern; AND if its determinant aint zero

Answer 16

ab d -b
cd -c a

Answer 17

is that the answer of this The equations can be written as
y+x=1
y-2x=1

?

Answer 18

oh, and divide by determinant

Answer 19

thats the answer in general; you should be able to fill in the specifics from that

Answer 20

now how should i inverse of the 2-by-2 matrix A?