Solve the system of equations using substitution.
A. x = 0, y = 4; x = - 2, y = 2
or 
, 
B. x = 0, y = -4; x = 2, y = 6
or 
, 
C. x = 0, y = 4; x = 2, y = 6
or 
, 
D. x = 0, y = -4; x = - 2, y = 2
or 
, 
Answer: A
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A. 
B. 
C. 
D. 
Find the center and radius of the circle with the given equation. (x - 8)2 + (y + 6)2 = 16
A. Center (-6, 8), r = 16 B. Center (8, -6), r = 16 C. Center (8, -6), r = 4 D. Center (-6, 8), r = 4
Estimate the quotient by first rounding each number as indicated.39.33 ÷ 15.7; Estimate by first rounding each number to the nearest ten.
A. 2 B. 20 C. 4 D. 0.2
Find three ordered pairs that are solutions of the given linear equation, and use them to graph the equation.y = 4x - 3
A. 
B. 
C. 
D. 