What is the radius of the circle defined by x^2+2x+y^2+6y-39=0?

The measure of one angle of an octagon is two times smaller that of the other seven angles. what is the measure of each angle?

Graph g(x)=2cosx . use 3.14 for π . use the sine tool to graph the function. graph the function by plotting two points. the first point must be on the midline and closest to the origin. the second point must be a maximum or minimum value on the graph closest to the first point.

Type the correct answer in each box. use numerals instead of words. if necessary, use / fir the fraction bar(s). the graph represents the piecewise function: h