Solve the system of equations by substitution.x + y = -9x - y = 17
A. (4, -13)
B. (4, 13)
C. (9, 4)
D. (9, -13)
Answer: A
Mathematics
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A. Scalar Field B. Vector field C. Meaningless
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Find the perimeter.
A. 118 m B. 74 m C. 104 m D. 148 m
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Identify the open intervals where the function is changing as requested.Increasing
A. (-?, -3), (0, 3) B. (-?, -3), (3, ?) C. (-3, 0), (3, ?) D. (0, 3)
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Find the product.
2
A. q2 - 
r2
B. q2 + 
r2
C. q2 - 
qr - 
r2
D. q2 - 1qr + 
r2
Mathematics