Graph the parabola or ellipse. Include the directrix that corresponds to the focus at the origin.r = 
A. 
B. 
C. 
D. 
Answer: D
Mathematics
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For the following pair of equations, predict whether they represent parallel lines, perpendicular lines, or lines that intersect but are not perpendicular. ? 5.4x + 9.9y = 6.6 and 9.9x - 5.4y = 8.2 ?
A. parallel lines B. lines that intersect but are not perpendicular C. perpendicular lines
Mathematics
Give the value of the function in radians.sin-1 -0.5116
A. -0.537 B. -0.637 C. 0.637 D. 0.537
Mathematics
Find a quadratic inequality whose solution is given.
A. x2 + 16 ? 0 B. x2 - 16 ? 0 C. x2 - 16 ? 0 D. x2 + 16 ? 0
Mathematics
Perform the indicated operations and write the result in standard form.
+ 
A. -12 B. -12i C. 12i D. 32i
Mathematics