Acertain ore is 31.8% nickel by mass. how many kilograms of this ore would you need to dig up to have 25.0 g of nickel?

If x = -2, then x 2-7x+10 equals a. 0 b.20 c.28

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.

Interpret the following expression (5y^2-7)^3/(2y)^2