Please help, how do I solve for x and y

An eight-sided die, which may or may not be a fair die, has four colors on it; you have been tossing the die for an hour and have recorded the color rolled for each toss. what is the probability you will roll a brown on your next toss of the die? express your answer as a simplified fraction or a decimal rounded to four decimal places.

What is the slope simplify your answer and write it as a proper fraction, improper fraction, or integer

Which is the completely factored from of xy^3-x^3y