如图,直线y=kx+b过A(-1,2)B(-2,0)两点,则0≤kx+b≤-2x的解集为 .
(+32)×(-60.6)×0×(-9)=______
-0.4×0.2=_______;
(-5)×(3)=_______;
(-3)×(-0.3)=_______;
确定下列各个积的符号,填在空格内: (1)(-7.4)×(-3.2)_______; (2)(-2)×(-2)×2×(-2)________; (3)(-)×(-)×(-)×(-)