Determine whether the equation represents a circle, a point, or has no graph. If the equation is that of a circle, find its center and radius. x^2 + y^2 - 8x + 4y + 18 = 0

Ineeeeed this is due tomorrow and i dont know the answer can you find all the exponents

Identify all the cases where non-probability sampling is used when attempting to study the characteristics of a large city. studies on every subject in the population divide a population in groups and obtain a sample studies with a limited amount of time demonstrate existing traits in a population studies with the nth person selected

Marking brainliest for original answer.. are these two triangles similar? how can you tell?