Graph the parabola or ellipse. Include the directrix that corresponds to the focus at the origin.r = 
A. 
B. 
C. 
D. 
Answer: B
Mathematics
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Reduce the fraction.
A. 
B. 
C. 
D. 
Mathematics
Write an inequality associated with the given graph.
A. x ? 1 B. x > 1 C. x ? 1 D. x < 1
Mathematics
Convert the measurement as indicated. Round to the nearest tenth, if necessary.31 cm to inches
A. 78.7 in. B. 12.1 in. C. 3.1 in. D. 9.3 in.
Mathematics
Factor completely.r4 - 2r2t2 + t4
A. (r - t)(r + t)(r2 + t2) B. (r - t)(r + t) C. (r2 - t2)2 D. (r - t)2(r + t)2
Mathematics