Question

help please

Answer 1

http://prntscr.com/16lrnh

I selected A

Answer 2

hi, howzit Lily?

Answer 3

good thanks

Answer 4

sorry,
x = 34/5 - (7/5)z
y = 11/5 + (2/5)z

z - free

Answer 5

so A is correct

Answer 6

yep, perfect

Answer 7

http://prntscr.com/16m6j5

Answer 8

is it D

Answer 9

@ganeshie8

Answer 10

thats right !

2x3, 2x2

number of columns of first matrix not equal to number of rows of second matrix. so we cant multuply

Answer 11

http://prntscr.com/16m7i3

i think its C

Answer 12

use wolfram to confirm ur solution :)

Answer 13

i tried

Answer 14

http://www.wolframalpha.com/input/?i=3x+-+2y+%2B+2z+-+w%09%3D%092%2C++4x+%2B+y+%2B+z+%2B+6w%09%3D%098%2C++-3x+%2B+2y+-+2z+%2B+w%09%3D%095%2C++5x+%2B+3z+-+2w%09%3D%091

Answer 15

i think so, no solution

Answer 16

http://prntscr.com/16m8ia

Answer 17

its A

Answer 18

http://assets.openstudy.com/updates/attachments/4fe15dcbe4b06e92b87080cd-agarcia2013-1355180978447-question17.jpg

Answer 19

@ash2326

Answer 20

@LilySwan The order of the matrix is correct. But the element a12 is the second element of the first row, can you find now?

Answer 21

You are asked to find A12
which implies element in first row which is also in second column.

Answer 22

Now I'll mark the columns