I need help with this, would the ratio be the pack of 12 to 1 roll or ?

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.

Zach spent 2/3 hour reading on friday a 11/3 hlurs reading on saturday. how much more time did he read on saturday tha on friday

The function f(x)= x5+ ( x + 3)2 is used to create a table. if x = -1 then what is f(x)?