Solve by completing the square

x^2-6x-16=0

The last time i bought this product , it cost $20.00 but it looks like it cost 29. 60 today? what is the increase

Which number line represents the solution set for the inequality -1/2x> 24?

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.