GH passes through (5, –1) and (9, 8), and EF passes through (4, –3) and (8, 6). Are the two lines parallel or perpendicular? Justify.

In the diagram, the measure of angle 9 is 85° which angle must also measure 85°?

1. find the area of the unshaded square 2. find the area of the large square 3. what is the area of the frame represented by the shaded region show

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}