Mrs. Tart takes a survey in class. She discovers 60% of her students prefer using pens over pencils in class. If 12 students in Mrs. Tart’s class prefer to use pens, how many total students are in Mrs. Tart’s class?

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}

50 will mark show all use the linear combination method to solve the system of equations. explain each step of your solution. if steps are not explained, you will not receive credit for that step. 2x+9y= -26 -3x-7y=13

In the figure, triangle aob and triangle boc form a linear pair ,find the measure of x