Factorise fully 21a - 7a2

Which is the equation of an ellipse with directrices at x = ±4 and foci at (2, 0) and (−2, 0)?

80 points suppose marcy made 45 posts online. if 23 of them contained an image, what percent of her posts had images? round your answer to the nearest whole percent. 54 percent 51 percent 49 percent 48 percent

Graph the system of equations. {6x−4y=−244x−8y=−32 use the line tool to graph the lines.