Write the augmented matrix for each system of equations.
-2x - 2y + 5z=1
-sx- 5y + 7z=4
9x - 2y + 2z=-1

Which equation represents a circle with a center at (–3, –5) and a radius of 6 units? (x – 3)2 + (y – 5)2 = 6 (x – 3)2 + (y – 5)2 = 36 (x + 3)2 + (y + 5)2 = 6 (x + 3)2 + (y + 5)2 = 36

Show your workcan a right triangle have this sides? *how to prove it without using the pythagorean theorema*

Three numbers x, y, and z are in the ratio 2: 7: 8. if 12 is subtracted from y, then three numbers form a geometric sequence (in the order x, y–12, z). find x, y, and z. there are 2 sets.