Solve the system of equations. If the system is inconsistent or has dependent equations, say so. x + 3y + 2z = 11 4y + 9z = -12x + 7y + 11z = -11
A. {(0, 3, 1)}
B. {(7, -1, -1)}
C. {(x, y, z)|x + 3y + 2z = 11}; dependent equations
D. ?; inconsistent system
Answer: D
Mathematics
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? 
A. 
B. 
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D. 
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Simplify.
A. y3/4
B. y
C. y1/2
D. 
Mathematics
Evaluate.(-7)3
A. 21 B. 343 C. -21 D. -343
Mathematics
Solve the problem.The angle of elevation from the top of a house to a plane flying 7200 meters above the house is x radians. If d represents the horizontal distance, in meters, of the plane from the house, express d in terms of a trigonometric function of x.
A. d = 7200 tan x
B. d = 7200 cot x
C. d = 
D. d = 7200 sec x
Mathematics