Solve the system of equations using matrices. Use Gauss-Jordan elimination.

3x + 5y + 2w = -12
2x + 6z - w = -5
-2y + 3z - 3w =-3
-x + 2y + 4z + w = -2

Pick the description of a geometric object that best matches the real world object box for a deck of card

Which is a true statement comparing the graphs of x^2/6^2-y^2/8^2 = 1 and x^2/8^2-y^2/6^2 the foci of both graphs are the same points. the lengths of both transverse axes are the same. the directrices of = 1 are horizontal while the directrices of = 1 are vertical. the vertices of = 1 are on the y-axis while the vertices of = 1 are on the x-axis.

A. 90 degrees b. 45 degrees c. 30 degrees d. 120 degrees