Which of the following constants can be added to x2 - 10x to form a perfect square trinomial? 10 25 100

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.

Joe has some money in his bank account he deposits 45$ write an expression that represents the amount of money in joe's account

1) prove that 731^3−631^3 is divisible by 100 2) prove that 99^3−74^3 is divisible by 25