Solved

Solve the System by the Substitution Method $x + y = 1$

Question 242

Multiple Choice

Solve the system by the substitution method.
- $x + y = 1$
$x ^ { 2 } + y ^ { 2 } = 16 y - 39$

A) $\{ ( - 3,4 ) , ( - 4,5 ) \}$
B) $\{ ( 4 , - 3 ) , ( 5 , - 4 ) \}$
C) $\{ ( 5 , - 4 , ( 6 , - 5 ) \}$
D) $\{ ( - 4,5 ) , ( - 5,6 ) \}$

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