If a spider can move 4/5 of a mile every hour how many hours would it take for the spider to go 4 miles

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.

The area of a circle is equal to 1 dm². find the radius of the circle.

Is a square always, sometimes, or never a parallelogram