What is UT?

(i really need help, and i don’t understand)

Which expression shows the sum of the polynomials with like terms grouped together

Anyone? 15m is what percent of 60m; 3m; 30m; 1.5 km?

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