One and a half pints equal blank cups

Math i have no idea how to do a and b

Solve the equation: x - 9 = -6 + 5 a. 21 b. 7 c. 14 d. 2

Let u = {q, r, s, t, u, v, w, x, y, z} a = {q, s, u, w, y} b = {q, s, y, z} c = {v, w, x, y, z}. list the elements in the set.a ∩ (b ∪ c)a) {q, s, w, y}b) {q, y, z}c) {q, s, u, w, y, z}d) {q, r, w, y, z}