A spinner has 20 equal-sized sections. Four of the sections are yellow a. What is the probability that the spinner will land on yellow?
b. Use words to describe the probability.

What is sin 7x/4 ? i need on this urgent trig

Fast! find the length of cu. the triangles are similar. show your work.

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}