What is the radius of a circle given by the equation x2 + y2 – 2x + 8y – 47= 0?

What is the solution to the system of equations? (–2, –8) (–1, –5) (0, –2) (2, 4)

Sanya noticed that the temperature was falling at a steady rate of 1.4 degrees every hour from the time that she first checked her outdoor thermometer. by 6 a.m., the temperature had fallen 21 degrees. which expression can you use to find how many hours earlier she had first checked the thermometer?

What is the distance between point a and b