(2, -6, 18, -54, 162, ...)
find the explicit rule?

Multiply each number by -3.

Step-by-step explanation:

2 times -3 = -6

6 times -3 = -18

18 times -3 = -54

54 times -3 = 162

the formula for the equation of a circle is (x – h)2+ (y – k)2 = r2, where (h, k) represents the coordinates of the center of the circle, and r represents the radius of the circle. if a circle is tangent to the x-axis at (3,0), this means it touches the x-axis at that point.