Solve the equation.x2 + 6x - 55 = 0
A. 11, -5
B. 11, 5
C. -11, 1
D. -11, 5
Answer: D
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Solve the equation.
= 
A. 
B. 
C. 
D. 
Find the indicated intersection or union.Let A = {q, s, u, v, w, x, y, z}, B = {q, s, y, z}, C = {v, w, x, y, z}, and D = {s}. List the elements in the set A ? B.
A. {v, x} B. {s, u, v, w, x, z} C. {q, s, u, v, w, x, y, z} D. {s, u, w}
Solve.An electronic circuit connected to a speaker emits a pure tone with a waveform given by y = yo sin
. Interestingly, this tone can be rendered (nearly) inaudible by placing a second speaker on top of the first and emitting a tone through the second speaker that has a phase shift of ? relative to the first speaker's waveform. Which waveform below would you choose for this second speaker?
A. y = yo sin
B. y = yo sin
C. y = yo sin
D. y = 
sin
Find all solutions of the equation.sin x csc x = -2 sin x
A. x = 
+ n? or x = 
+ n? or x = n?
B. x = 
+ n? or x = 
+ n? or x = n?
C. x = 
+ 2n? or x = 
+ 2n? or x = n?
D. x = 
+ 2n? or x = 
+ 2n? or x = n?