PLEASE HELP ASAP Determine the period.

1mile equals approximately 1.6 kilometers. which best approximates the number of miles in 6 kilometers?

9/10 divide by -3/15 as a mixed number

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.