Solve the system of linear equations using the Gauss-Jordan elimination method. 2x  +  2y  +  z  =  10 x      +  z  =  2     4y  −  3z  =  24 (x, y, z) =

Solve the system 2x6y+6z=462x3y=31.

Solve the system of equations using a matrix: {2x5y+3z=83xy+4z=7x+3y+2z=3 .

The number of sides x and the combined number of sides and diagonals y for each of three regular polygons are shown below. Write a system of linear equations to find an equation of the form y=ax2+bx+c that represents the relationship between x and y for the three polygons.