Find the difference.-27 - (-27)
A. 54
B. 0
C. -54
D. 81
Answer: B
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Simplify the expression using the order of operations. Write the answer as an improper fraction where appropriate.29 + (11 ? 8) - 14
A. 306 B. 34 C. 103 D. -240
Sketch the given surface.x = 1 - y2 - z2
What will be an ideal response?
Solve the problem.Two low-frequency sound waves with similar frequencies, producing the pressures 
and 
combine to form a pressure P = P1 + P2 . The variable t is time measured in seconds. Graph P in 
by 
and use the graph to determine the frequency of the displayed beats.
A. 10 beats per second B. 8 beats per second C. 13 beats per second D. 5 beats per second
Find an equation for the ellipse with center at the origin, major axis of length  figure 1.png)
, minor axis of length  figure 2.png)
, and whose foci lie on the y -axis.
What will be an ideal response?