The spheres are similar. The surface area of the blue sphere is 7854 square inches. What is the surface are of the red sphere? blue sphere is r=25
red sphere is r=10

In the image, point a marks the center of the circle. which two lengths must form a ratio of 1 : 2? (options are in the images since thought they were harmful phrases)

True or false? a circle could be circumscribed about the quadrilateral below.

What is the solution to this system of equations? y= 2x - 3.5 x - 2y = -14