What is the most efficient first step to isolate the variable term on one side of this equation? -9x = -4x + 5 a. subtract 5 from both sides. b. add 5 to both sides. c. subtract 9x from both sides. d. add 4x to both sides.

Aroulette wheel has 38 slots in which the ball can land. two of the slots are green, 18 are red, and 18 are black. the ball is equally likely to land in any slot. the roulette wheel is going to be spun twice, and the outcomes of the two spins are independent.the probability that it lands one time on red and another time on black in any order is(a) 0.5 (b) 0.25 (c) 0.4488 (d) 0.2244