What is 3/5 multiply by 5/6

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.

Arational number that is equivalent to -20/4?

Find the interior angle of a regular polygon which has 6 sides