Maths hw, please help for d and e

1. 3

2. 4

3. 1

hope this ! have a great day.

-wfz

it's

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.