Solve the problem.For what value of a is the volume of the tetrahedron formed by the coordinate planes and the plane 
equal to 7?
A. a = 
B. a = 
C. a = 
D. a = 
Answer: C
Mathematics
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Solve the system.5x - 7y + 6z = 7-20x + 28y - 24z = -2820x - 28y + 24z = 28
A. Infinitely many solutions B. (-3, 2, 6) C. No solution D. (2, 6, -3)
Mathematics
Provide an appropriate response.Simplify by applying the distributive principle: -4(x + 6)
A. -4x - 24 B. -4x + 2 C. -4x + 6 D. -4x + 24
Mathematics
Solve.A consultant charges $350 plus $35 an hour. How many hours did the consultant work if the total bill were $910?
A. 10 hours B. 560 hours C. 16 hours D. 26 hours
Mathematics
Choose the terminology that best classifies the given figure.
A. Simple concave curve B. Simple closed convex curve C. Polygon D. Concave polygon
Mathematics