Show that the area of the cross is given by the expression 12(6x +1).

Find the midpoint of the segment with the given endpoint k(-4,4) and l(6,12)

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

The area of a rectangle is 15+5y square feet. which of the following expressions could be the length of the sides of the rectangle, in feet a. 5 and 3y b. 5 and 3+y c. 5 and 5+y d. 3 and 5+3y