SAT Math Practice Question #20356 - SATify | SATify

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SAT Math Practice Question #20356 - SATify | SATify

#20356

coordinate geometry

circles

hard

180 sec

Calculator OK

In the $x y$ -plane, the graph of the given equation is a circle. What is the length of the circle's radius? $x^{2} - 8 x + y^{2} = 10 y + 80$

A.

$10$

B.

$11$

C.

$105$

D.

$120$