What is the radius of a circle whose equation is x2+y2+8x−6y+21=0?
1 answer:
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Answer:
b.
Step-by-step explanation:
The scale factor is the number by which one must multiply all sides in a triangle such that its sides are the same as another triangle. This only works in similar triangles (triangles where all of the angles between them are congruent or have the same measures).
5g + 4(-5 + 3g) = 1 - g
5g - 20 + 12g = 1 - g
17g - 20 = 1 - g
there can be to answer
g =
or
you can simplify
or 
5g - 20 + 12g = 1 - g
17g - 20 = 1 - g
there can be to answer
g =
you can simplify