Question

use the matrix tool to solve the system of equations enter the answer as an ordered pair -5x+6y=-3 6x-6y=12

Answer 1

are you supposed to use row reduction to solve this?

Answer 2

yes

Answer 3

alright one second

Answer 4

-5x+6y=-3
6x-6y=12


Convert to matrix form


-5 6 -3
6 -6 12


Now perform row reduction



1 -6/5 3/5 (-1/5)*R1 ---> R1
6 -6 12



1 -6/5 3/5
0 6/5 42/5 R2 - 6*R1 ---> R2



1 -6/5 3/5
0 1 7 (-1/5)*R2 ---> R2



1 0 9 R1 + (6/5)*R2
0 1 7


So the solutions are x = 9 and y = 7

Answer 5

yay thank you so much hun!

Answer 6

you're welcome

Answer 7

i need help with this one as well, same way of solving it and answer needs to be an ordered pair :) if you could helpid be very appreciative

4x-7y=-12
-2+6y=11

Answer 8

alright one second

Answer 9

I'm assuming you mean -2x+6y = 11 in the second equation right?

Answer 10

yes

Answer 11

alright sorry about that, got distracted for a second

Answer 12

4x-7y=-12
-2x+6y=11


Convert to matrix form


4 -7 -12
-2 6 11


Now perform row reduction



1 -7/4 -3 (-1/5)*R1 ---> R1
-2 6 11



1 -7/4 -3
0 5/2 5 R2 + 2*R1 ---> R2



1 -7/4 -3
0 1 2 (2/5)*R2 ---> R2



1 0 1/2 R1 + (7/4)*R2
0 1 2


So the solutions are x = 1/2 and y = 2