The equation of a circle is given below.
x^2?+ (y - 7.5)^2 = 9/49
What is its center?

The center is (0 , 7.5)

Step-by-step explanation:

This is the form of a circle. Use this form to determine the center and radius of the circle.

(x - h)^2 + (y - k)^2 = r^2

Match the values in this circle to those of the standard form. The variable (r) represents the radius of the circle, (h) represents the x-offset from the origin, & (k) represents the y-offset from origin.

r = 3/7

h = 0

k = 7.5

The center of the circle is found at (h , k)

Center: (0 , 7.5)

These values represent the important values for graphing and analyzing a circle.

Center: (0 , 7.5)

Radius: 3/7

80° is the measure of gh

step-by-step explanation:

circle f is congruent to circle j

we have two circle with center f and j.

both circles are congruent. the radius of the circle would be equal.

see the attachment for the circle.

we are given ∠efd ≅ ∠gjh

therefore, arc (ed) = arc (gh)     (∴ circle f is congruent to circle j)

but ∠dfe=80°=arc (ed)

therefore, arc (gh) = 80°

thus, 80° is the measure of gh

it is a secret for it not to be compromised sorry

step-by-step explanation: