Plot the graph of the equation. Check for symmetries and find all x- and y-intercepts.y = x3 + 5x2 - x - 5
A. 
B. 
C. 
D. 
Answer: B
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Determine the indicated function.A rectangular garden is to be surrounded on three sides by a fence costing $5 per foot and on one side by a stone wall costing $20 per foot. Let x be the length of the side with the stone wall, and let y be the length of each of the other three sides. Express the cost C of enclosing the garden as a function of the length and width.
A. C(x, y) = 20x - 15y B. C(x, y) = (20x)(15y) C. C(x, y) = 15x + 20y D. C(x, y) = 20x + 15y
Multiply and simplify.cos ? sin ? (sec ? - csc ?)
A. cos2? - 1 B. 1 C. sin ? - cos ? D. sin ? - 2 csc ?
Use the definition of a logarithm to prove 
.
?
A. By the definition means 
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B. By the definition means 
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C. By the definition means 
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Factor the trinomial.n4 - 6n2 - 16
A. (n2 - 2)(n2 - 8) B. (n2 + 2)(n2 - 8) C. (n2 + 6n + 2)(n2 - n - 8) D. (n2 - 2)(n2 + 8)