When constructing inscribed polygons, how can you be sure the figure inscribed is a regular polygon?

Given that anna wants to spend less than $60 for the subscription and only full month subscriptions are offered, what is the maximum number of months that ana can subscribe

Find the quotient. 50a2 – 98b2 -5a +7b

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