Signed Numbers Question-Digital Design- Could you help me? Please do not send unnecessary things on this problem.

The ratios 3: 9, 4: 12, 5: 15, and 6: 18 are a pattern of equivalent ratios in the ratio table. which is another ratio in this pattern?

For f(x) = 3x+1 and g(x) = x2 - 6, find (g/f)(x)

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.