Solve.
= 1 + 
A. -3, -1
B. 3, -1
C. 3
D. empty set solution
Answer: B
Mathematics
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Provide an appropriate response.Integrate 
using the substitution u = cot x and using the substitution 
Show the results are the same.
What will be an ideal response?
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Solve.The amount of particulate matter left in solution during a filtering process is given by the equation 
where n is the number of filtering steps. Find the amounts left for 
and 
(Round to the nearest whole number.)
A. 800, 25 B. 1600, 50 C. 800, 50 D. 800, 12,800
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Determine if the parabola whose equation is given opens upward or downward.y = -4x2 - 2x - 9
A. downward B. upward
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Evaluate the expression for the given value or values.-xy for x = - 6, y = -64
A. 384 B. -370 C. -384 D. 370
Mathematics