Question

what is the value of x, y, and z for (5/4)x-(4/3)y+(5/4)z=6 , (5/16)x+(5/4)y-(4/16)z=-4 , (3/4)x-1y+(3/4)z=6

Answer 1

Do you have a TI-84, or something?

Answer 2

yes ?

Answer 3

Haha, wanna just plug it into your matrix?

Answer 4

i dont have matrix table

Answer 5

You do have a TI-84, right? Just click 2nd and that button x^-1

Answer 6

then wat do u do :D

Answer 7

haha, okay, basically, you take all the numbers that have a constant and take that constant away, and put it into the calculator. So you take your system of equations and make the matrix (first row or column, i forgot )--5/4, -4/3, and 5/4

Answer 8

actually first, go to the edit and make a new matrix that is 3x3

Answer 9

then wat do u do :D

Answer 10

where do you put the last values like 6, -4, and 6

Answer 11

then plug in the numbers that are in your system of equations : 5/4, -4/3, 5/4.....5/16, 5/4, -4/16......3/4, -1, and 3/4. Then make a new matrix that is 3x1 and plug in what your system of equation equals: 6, -4, and 6. Then do this A^-1, (make sure you click the x^-1 button) and then times B

Answer 12

haha why is my computer so laggy? put those in a new matrix 3x1. You should get the answer 16, -12, -24. At least that's what i got

Answer 13

then wat do u do :D

Answer 14

i didnt get times b part ?

Answer 15

You take the first 3x3 matrix, just click enter on it then click on the button that says x^-1, and then click the 2nd matrix and click enter

Answer 16

then wat do u do :D

Answer 17

thank uuu

Answer 18

Haha you got it? no problem

Answer 19

then wat do u do :D

Answer 20

yess :)