What is the radius of a circle whose equation is (x + 5)2 + (y - 3)2 = 42? O 2 units
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4 units
8 units
16 units

The radius of the circle is:

Step-by-step explanation:

Given the equation

As we know that

is the equation of the circle with a radius 'r', centered at (a, b)

so, the circle properties are:

Therefore, the radius of the circle is:

units

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step-by-step explanation:

the graph in the attached figure

step-by-step explanation:

we have

using a graphing tool

the graph in the attached figure

the roots are ( x-intercepts) x=-0.5,x=1,x=3

the y-intercept is the point (0,3)