What is the value of the missing exponent? (-2x^3)^? =-8x^9

i think it's just 9..but that seems too easy.

Solve the following simultaneous equation by using an algebraic method (either substitution or elimination) 2x + 3y=-4 4x-y=11

Can some one explain this i got sent this. is this a threat i’m scared

There are three bags: a (contains 2 white and 4 red balls), b (8 white, 4 red) and c (1 white 3 red). you select one ball at random from each bag, observe that exactly two are white, but forget which ball came from which bag. what is the probability that you selected a white ball from bag a?