Write the equation of the circle with center (2, -3) and a radius of 4. a) (x + 2)2 + (y - 3)2 = 4 b) (x - 2)2 + (y + 3)2 = 4 c) (x + 2)2 + (y - 3)2 = 16 d) (x - 2)2 + (y + 3)2 = 16

Use the discriminant to describe the roots of each equation. then select the best description. 2m2 + 3 = m double root real and rational roots real and irrational roots non-real roots

Express the following as a function of a single angle. cos(60) cos(-20) - sin(60) sin(-20)

Rhombus adef is inscribed into a triangle abc so that they share angle a and the vertex e lies on the side bc . what is the length of the side of the rhombus if ab=c, and ac=b.