Question

Please help me! Fan, medal, testimony! Urgent!
Find the value of the variable. Show all work.
[ x-5 9 ] = [ -7 w+1 ]
[ 4 t+2 ] = [ 8-r 1 ]

Answer 1

x-5 = 7
w+1 = 9
4 = 8 - r
t +2 = 1
Find the values

Answer 2

@sangya21 can you help me with another?

Answer 3

@bohotness can you help?

Answer 4

yes

Answer 5

Sure

Answer 6

ok let me get it real quick

Answer 7

ok

Answer 8

I need help on 13 and 15

Answer 9

ifk abou t hat

Answer 10

ok, then can you help me sangya?

Answer 11

15. [-14 -4]
[33 -7]
and 13 might take time

Answer 12

I already have the answers to them, the thing I need to do is show steps.

Answer 13

13. Undefined.
15. [-14 -2]
[ 43 -7]

Answer 14

13. Matrix A and B cannot be multiplied together because the number of columns in A does not equal the number of rows in B. In this case, the multiplication of these two matrices is not defined.

Answer 15

15. AC - BD
AC
1ST TERM OF AC = (6)(-2) + (1)(4) +(0)(2) + (8)(1)
2ND TERM OF AC = (6)(1) + (1)(0) +(0)(2) + (8)(1)
3RD TERM OF AC = (-4)(-2) + (3)(4) +(7)(2) + (11)(1)
4TH TERM OF AC = (-4)(-2) + (3)(4) +(7)(2) + (11)(1)

BC
1ST TERM = (1)(5) + (3)(3)
2ND TERM = (1)(-2) +(3)(6)
3RD TERM =(-2)(5) + (4)(3)
4TH TERM =(-2)(-2) +(34(6)
Do this in matrix form
then subtract respective terms

Answer 16

ok, so..:

Answer 17

[(6)(-2) + (1)(4) +(0)(2) + (8)(1) (6)(1) + (1)(0) +(0)(2) + (8)(1)]
[(-4)(-2) + (3)(4) +(7)(2) + (11)(1) (-4)(-2) + (3)(4) +(7)(2) + (11)(1)]
MINUS
[(1)(5) + (3)(3) (1)(-2) +(3)(6)]
[(-2)(5) + (4)(3) (-2)(-2) +(34(6)]

Answer 18

=[-12 + 4 + 0 + 8 6 + 1 + 0 +8 ]
[8 + 12 + 14 + 11 8 + 12 + 14 + 11]
MINUS
[5 + 9 -2 + 18]
[-10 + 12 4 + 204]

now what?

Answer 19

do I add? and then subtract the two?

Answer 20

yups

Answer 21

=[0 15 ]
[55 45]
MINUS
[14 16]
[2 208]

Answer 22

is that right?

Answer 23

sorry the last term of bd is (3)(6)
thus making whole equation
=[0 15 ]
[55 45]
MINUS
[14 16]
[2 22
sorry for late reply site prob