Find the GCF for the post
-21x^3 , 6x^4
The greatest common factor is

Use set builder notation to represent the following set: { -3, -2, -1, 0}

Find the equation of the ellipse with the following properties. the ellipse with foci at (0, 6) and (0, -6); y-intercepts (0, 8) and (0, -8).edit: the answer is x^2 over 28 + y^2 over 64 = 1

What is the area of a rectangle with vertices (-8,-2), (-3,-2), (-3,-6), and (-8,-6)? units