Write the following interval in set builder notation : (2,10)

Simplify the expression. -2/5(10+15m-20n)

What are the solutions of the system? solve by graphing. y = -x^2 - 3x + 2 y = -2x + 2

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.