Please help, i need this for an exam

Which value is not a solution of 8x^3 – 1 = 0

If a || b and b | y, then ? a) x || y. b) x | a. c) a | y. d) a || y.

What is the range of the function? f(x)=-2|x+1|? a. all real numbers. b. all real numbers less than or equal to 0. c. all real numbers less than or equal to 1. d. all real numbers greater than or equal to 1