What expression is equivalent to (2x^2+4x-7)(x-3)

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 are the values of each variable in the diagram below?

Zahra runs a 500-meter race at a constant speed. which graph shows her distance from the finish line during the race?