What the heck does this mean? I will mark whoever answers with good answer brainliest. Edit: Sorry I forgot the image

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

Nine people are going to share a 128-ounces bottle of soda. how many ounces will each person get drink? choose the correct equation and answer for this situation

What are the excluded values? m+5/mn+3m