In right triangle ABC with LB a right angle, a B'C'connects side AB with the hypotenuse so that ZAB'C' is a right angle as shown. Use facts about similar triangles to show why cos C' = cos C. Can someone help me with this answer

Can someone me out here and the tell me the greatest common factor

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

Hurry which expression is equivalent to 3√x^5y?