Which of the following circle equations represents a circle whose center is at (0, 0)?
a.
x2 + y2 = 45
b.
(x − 3)2 + (y − 5)2 = 0
c.
(x + 3)2 + (y − 3)2 = 0
d.
x2 + (y − 1)2 = 1

A. x²+y²=45

Step-by-step explanation:

The equation of a circle centered at the origin is of the form:

where r is the radius of the circle.

Among the given options, the only equation that looks like this is

The rest are equations of a circle with center not at the origin.

The correct choice is A.

0.038

step-by-step explanation:

step-by-step explanation:

rectangles are made up of 4 right angles, which means that a side and a base meet perpendicular to one another.   their slopes then have to reflect perpendicular slopes.   perpendicular slopes are opposite reciprocals of one another.   for example, if the slope of one line is +2/3, then the perpendicular slope to that would be -3/2.   so we look for that combination in our choices.

all of them satisfy that condition (so what's the question, i guess? )