If x+y+2=0,then x^3+y^3+8 equals to

Simplify a7/a4 a) 1/a3 b)-a/a2 c)a4/a3 d)a3

Jack did 3/5 of all problems on his weekend homework before sunday. on sunday he solved 1/3 of what was left and the last 4 problems. how many problems were assigned for the weekend?

The graph of f(x) = |x| is transformed to g(x) = |x + 11| - 7. on which interval is the function decreasing?