What is the center of the circle x2 + y2 + 11x + 18= 0?

(- 5.5 , 0) is the center

Step-by-step explanation:

center ( h, k)

Circle: (x-h)² + (y-k)² = r²

x² + y² + 11x + 18= 0

(x²  + 11x + 5.5²) + (y - 0)² = 5.5² - 18

(x + 5.5)² + (y - 0)² = 12.25

(x - (-5.5))² + (y - 0)² = 3.5²

h = -5.5      K = 0      r = 3.5

three-fourths of an hour

36÷48=0.75

0.75=