Determine the value of k so that the equation x2+Kx+k-1=0has exactly one real root

3382-299=3383- ? fill in the blank?

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?

Asquare has a side that measures 11 units. what is the area of a circle with a circumference that equals the perimeter of the square? use 3.14 for π, and round your answer to the nearest hundredth. 1519.76 units2 379.94 units2 616.56 units2 154.14 units2