Xiao's teacher asked him to rewrite the sum of 60 + 90 as the product of the gcf of the two numbers and a sum. xiao wrote 3(20 + 30). what mistake did xiao make? how should he have written the sum?

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}

Simplify each expression. use positive exponents. show work . (x –2 y –4 x 3 ) –2

Two less than the quotient of a number and four is less than six. i need the inequality. a. x< 32 b. x< -32 c. x> 16 d. x> -16