Use Cramer's rule to solve the system. If D = 0, use another method to complete the solution.-5x + 3z = -21 4x + 7y - 6z = 51 2x - 5y = -27
A. {(9, -9, -8)}
B. {(9, 9, 8)}
C. {(9, 8, 9)}
D. ({10, 7, 8)}
Answer: B
Mathematics
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Evaluate the integral.
A. 24?2 B. 36?2 C. 27?2 D. 72?2
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Determine the local extrema of the function.f(x, y) = x2 - y2
A. None B. f(0, 0) = 0, minimum C. f(1, 1) = 0, maximum D. f(0, 0) = 0, maximum
Mathematics
Refer to the figure in which O is the center of the circle, ray PA is a tangent, m?BOC = 80°, PE = 10 ft, PD = 12 ft, PB = 19 ft, ER = 4 ft, ER = 4 ft, and BR = 5 ft.
Find m?PAR.
(a) 20° (b) 40° (c) 60° (d) 90°
Mathematics
Find the slope of the line containing the two points.(6, 1); (-2, 1)
A. -8
B. 
C. 0
D. undefined
Mathematics