Find all solutions of the equation in the interval [0, 2?).(8 sec x - 16)(4 sec x - 4) = 0
A. 
B. 
C. 
D. 
Answer: C
Mathematics
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Solve the system.2x + 8y + 8z = 0x + 4y + 4z = 0x + y + z = -5
A. (-5, 5, -4) B. (-4, 5, -5) C. (-5, -4, 5) D. No solution
Mathematics
Find the intersection.x + y + z = -6, x + y = -1
A. x = -t, y = -1 + t, z = -5 B. x = -t, y = -1 + t, z = 5 C. x = -1, y = 1 - 1t, z = -5t D. x = t, y = -1 - t, z = -5
Mathematics
Solve the problem.Find the value of k so that the graph of 25y + kx = 4 and the line containing the points (5, -8) and (2, 4) are perpendicular.
A. k = 100 B. k = -6.25 C. k = 6.25 D. k = -100
Mathematics
Solve by completing the square.7x2 + 21x = - 14
A. 1, 2
B. - 
, 
C. - 2, - 1
D. no real-number solution
Mathematics