Which of the following circles have their centers on the x-axis? check all that apply.

a. (x - 2)2 + (y + 3)2 = 2
b. (x - 0)2 + (y - 3)2 = 23
c. (x - 0)2 + (y - 0)2 = 72
d. (x - 4)2 + (y - 0)2 = 74

Step-by-step explanation:

Given the equations of circle. we have to find the equation of circle whose center on the x-axis.

The standard form of equation of circle is  

where (h,k) is center and r is radius.

Given equations are

           Center:(2,-3)

          Center:(0,3)

          Center:(0,0)

          Center:(4,0)

The points with ordinate 0 lies on x-axis

Hence,