Question

Pre Calc help :( PLEAASSSEEEE

Answer 1

crap i remember doing this X| this is so going to kill me now because this part i understood let me think

Answer 2

eeek it's an emergency :(

Answer 3

do you have notes for this showing how to do it?

Answer 4

i don't need 32

Answer 5

ahhhh im going to die trying to remember this is so easy too im thinking too hard

Answer 6

i am not able to open the file

Answer 7

how can I post it so you can see it?

Answer 8

can u post the question directly?

Answer 9

\[33. Find the values of x and y for which \left[\begin{matrix} 2y+5 \\ y-2 \end{matrix}\right] =\left[\begin{matrix} x-1 \\ 3x\end{matrix}\right] is true.\]

Answer 10

33. Find the values of x and y for which if you couldn't read that sorry

Answer 11

\[6x -4y=12\]
\[y=\frac{3}{2}x-3\]
\[m_{N}=-\frac{2}{3}\]
\[m_{N}=-\frac{2}{k}\]
Therefore k=3

Answer 12

Oops you don't need 32. Nvm.

Answer 13

I apologize :/ can you help with the others??

Answer 14

\[x-2y=6[1]\]
\[3x-y=-2[2]\]
\[[1]\times 3\]
\[3(x-2y)=3(6)\]
\[3x-6y=18[3]\]
\[[2]-[3]\]
\[(3x-y)-(3x-6y)=(-2)-(18)\]
\[5y=-20\]
\[y=-4\]
Substitute the y-value (ie. -4) into any of the three equations above (ie. [1], [2], [3]) to find the x-value.

Answer 15

THANK YOU SO MUCH!!! 34??

Answer 16

I don't get the format of 34. That's a question foreign to me. What topic is that question from?

Answer 17

Is that absolute values?

Answer 18

i would assume its find the determinant
of course i could be wrong

Answer 19

its to solve the matrix

Answer 20

you cant "solve" a matrix

http://en.wikipedia.org/wiki/Determinant

Answer 21

I apologize!! it is to find the determinant

Answer 22

You don't need anyone's help with that. Just read the wiki page. It shows you what to add and subtract.

Answer 23

\[\left[\begin{matrix}a & b & c \\ d & e & f \\ g & h & i \end{matrix}\right]\]
\[aei+bfg+cdh-ceg-bdi-afh\]