Solve the system by substitution.
x - 
y = -18
x + 
y = -9
A. {(-12, 0)}
B. {(0, 12)}
C. {(0, -12)}
D. {(12, 0)}
Answer: A
Mathematics
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A. 
B. 
C. 
D. 
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Give the coordinates for the vertex for the parabola.x = y2 + 4y + 10
A. (0, 2) B. (6, -2) C. (10, 0) D. (-2, 6)
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Solve the system of equations. 3x - y = 6 2y + z = 20x + 4z = 13
A. {(5, 9, 2)} B. {(-5, -9, -2)} C. ? D. {(10, 18, 4)}
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Provide an appropriate response.Name the following line in three different ways. 
What will be an ideal response?
Mathematics