Represent the following sentence as an algebraic expression, where "a number" is the letter x. \text{3 less than a number.} 3 less than a number. plss asap

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.

What 620000 divided by 10 to the third power

What is the volume if this rectangular prism: 5/2 cm by 3/4 cm by 1/3 cm