Angles X and Y are supplementary. Angle X measures 2x-9. Angle Y measures 135 degrees. What is the value of x?

Which of the following is not a subset of {1,2,3}?

Afrequency table of grades has five classes (a, b, c, d, f) with frequencies of 3, 13, 14, 5, and 3 respectively. using percentages, what are the relative frequencies of the five classes?

If you are dealt 4 cards from a shuffled deck of 52? cards, find the probability that all 4 cards are diamondsdiamonds.