The circle below is centered at the point (3, 1) and has a radius of length 2. What is its equation?
10
A. (x-1)2 + (y - 3)2 = 4
B. (x + 1)2 + (y + 3)2 = 2
C. (x+3)2 + (x + 1)2 = 4
O D. (x-3)2 + (x - 1)2 = 2²

Find the measure of the interior angles of the following regular polygons: a triangle, a quadrilateral, a pentagon, an octagon, a decagon, a 30-gon, a 50-gon, and a 100-gon.

X/y + 4y/x divided by x/y - 2y/x explain as in depth as you can how you simplfied the fractions. i don't know where to start on this : /

The bottom of ignacio's desktop is 74.5cm from the floor. ignacios sits in his adjustable chair, and the tops of his legs are 49.3cm from the floor. each clockwise rotation of the knob on the chair raises ignacio's legs by 4.8cm. write an inequality to determine the number of clockwise rotations, r, ignacio could make with the knob without his legs touching the desk.