What is the center of the circle x2 + y2 - 49 = 0?

Simplify any fractions.

the origin (0, 0)

Step-by-step explanation:

The equation of a circle centred at the origin has the form

x² + y² = r² ← r is the radius of the circle

Given

x² + y² - 49 = 0 (add 49 to both sides)

x² + y² = 49 ← in standard form

with centre (0, 0) and r = 7