Find the vertex of the parabola by completing the square.y = -x2 - 2x - 8
A. (-1, -9)
B. (-1, 7)
C. (1, 7)
D. (-1, -7)
Answer: D
Mathematics
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Solve the problem.Write an iterated triple integral in the order 
for the volume of the rectangular solid in the first octant bounded by the planes 
, 
, and 
.
A. 
B. 
C. 
D. 
Mathematics
Factor by grouping.5xy + 20x + 7y + 28
A. (5x + 4)(y + 7) B. (5x + 7)(y + 4) C. (5x + 7y)(y + 4) D. (5x + y)(7y + 4)
Mathematics
Find the magnitude 
and direction angle ?, to the nearest tenth of a degree, for the given vector v. v = -3i - 4j
A. 5; 53.1° B. 5; 216.9° C. 7; 233.1° D. 5; 233.1°
Mathematics
Simplify.16
A. 32u2v4 B. 4u4v8 C. 16u2v4 D. 4u2v4
Mathematics