Solve by the substitution method.0.7x + 0.2y = -0.1 x - 0.7y = -3.1
A. {(-1, 3)}
B. {(3, -1)}
C. {(-0.1, 0.3)}
D. ?
Answer: A
Mathematics
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Convert the equation to the standard form for an ellipse by completing the square.4x2 + 25y2 - 8x + 150y + 129 = 0
A. 
+ 
= 1
B. 
+ 
= 1
C. 
+ 
= 1
D. 
+ 
= 1
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Add the polynomials. Assume all variable exponents represent whole numbers.
+ 
A. 
x6 - 
B. 
x2 + 
x - 
C. 
x2 - 3x + 2
D. 
x4 + 
x2 - 
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Determine whether the infinite geometric series converges. If the series converges, determine the limit.6 + 24 + 96 + 384 + ...
A. Diverges B. Converges; 126 C. Converges; 2046 D. Converges; 510
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Use the graph of the rational function shown to complete the statement.
As x?3+, f(x)? ?
A. 0 B. 3 C. -? D. +?
Mathematics