Could somebody help me with this question​

Ajar contains a mixture of 20 black marbles, 16 red marbles, and 4 white marbles, all the same size. find the probability of drawing a white or red marble on the first draw. 125 12 01 next question ask for turn it in

Including 6% sales tax, an inn charges $135.68 per night. find the inns nightly cost

If x-1 and x+3 are the factors of x3+10x2+ax+b find a and b