How do you find the center and the radius for ?

The center is (0,0) and the radius is 5

Step-by-step explanation:

To find the center of a circle, you need to look at the equation

In this case this equation could be written as

The x value is x=0 for the center and the y values is y=0

The radius can be found by looking at the constant that is squared, so r=5

In the case of an equation like this

The center point would be (1,-1) and r=3

question 1: step-by-step explanation:

1/4 of 84 = 84÷4= 21