Find all complex numbers z such that z^4 = -4. All solutions should be expressed in the form a+bi, where a and b are real numbers.

Based on the figures as marked, /\rqs = —

Over which interval is the graph of f(x) = x2 + 5x + 6 increasing?

Abag contains 3 red marbles, 2 blue marbles, and 2 green marbles. one marble is picked, then another marble. assume that the selections are made with replacement. a) find the probability of picking two red marbles with replacement. b) find the probability of picking a red marble and a blue marble. assume the selections are made without replacement. c) find the probability of picking two red marbles without replacement. d) find the probability of picking a red marble and a blue marble without replacement.