2. use gauss-jordan elimination to solve the following linear system.
x-2z = 9
6x - 2y - 5z = 29
-5x + 5y + 3z =-14
lt
o a.(3,2,-3)
o ,–3,0)
o c.(3,6,-4)
d.(5,3,-5)

White shapes and black shapes are used in a game. some of the shapes are circles. while the rest are squares. the ratio of the number of white shapes to the number of black shapes is 5: 11. the ratio of the number of white cicrles to the number of white squares is 3: 7. the ratio of the number of black circles to the number of black squres is 3: 8. work out what fraction of all the shapes are circles.