Help me please i need help

This is so harddd! solve. 1 + 1 = solve 4 + 4 = solve 3 x 3

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

In the diagram, ab is tangent to c, ab = 4 inches, and ad = 2 inches. find the radius of the circle.