Determine the number of solutions to the equation cos^2x+ 3cosx+1 = 0 for O<X< 2pi.

What is the nth term rule of the linear sequence below? 27 , 25 , 23 , 21 , 19 , . .

Which equation represents a circle with a center at (–3, –5) and a radius of 6 units? (x – 3)2 + (y – 5)2 = 6 (x – 3)2 + (y – 5)2 = 36 (x + 3)2 + (y + 5)2 = 6 (x + 3)2 + (y + 5)2 = 36

Can someone me out here number 4 plz