For problems 13 and 14 use the values of a, b,and c to identify the vertex.
A. 
B. 
C. 
D. 
E. None of these
Answer: C
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Solve the equation by making an appropriate substitution.x4 + 2x2 - 24 = 0
A. {-4, 6}
B. {2, i
}
C. {- 
, 
, -2i, 2i}
D. {-2, 2, -i
, i
}
Solve the system of equations. If the system is dependent, express solutions in terms of the parameter z.x + 2y + 4z = -13 5y + 5z = -5 z = -4
A. (-3, 3, -4) B. (-3, -4, 3) C. (-4, 3, -3) D. No solution
Solve.The daily profit in dollars of a specialty cake shop is described by the function P
where x is the number of cakes prepared in one day. Find P(40).
A. P(40) = 12,800 B. P(40) = 0 C. P(40) = 3840 D. P(40) = -16,640
Convert the rectangular equation to a polar equation that expresses r in terms of ?.x2 + y2 = 4
A. r = 4 B. r(cos ? + sin ?) = 4 C. r = 2 D. r(cos ? + sin ?) = 2