The worlds hardest riddles; what has feet and legs, and nothing else? what invention lets you look right through a wall? what has a tongue, cannot walk, but gets around a lot? first one with all right answers get 90 points

Find the center and the radius of the circle with the equation: x^-2x+y^2+4y+1=0

In at least 150 words, explain how fugard uses sam's character to convey the central idea of "master harold" and the boys. be sure to include transitional words in your response. use details from the play to support your response.

What would happend if organ systems failed to work together