Determine the standard equation of the hyperbola with the given characteristics and sketch the graph.A focus is at (
, 0) and the vertices are at (-5, 0), (5, 0).
A. 
- 
= 1
B. 
- 
= 1
C. 
- 
= 1
D. 
- 
= 1
Answer: C
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Use a graphing calculator to determine which expression completes the identity.The expression 
is to be the left hand side of an equation that is an identity. Which one of the following four expressions can be used as the right hand side of the equation to complete the identity?
A. cos x + 1 B. tan x - sec x C. cot x + sin2x D. sin x + cos x
Find the term that should be added to the expression to form a perfect square trinomial. Write the resulting perfect square trinomial in factored form.x2 + 18x
A. 324; 
2
B. 81; 
2
C. 81; 
2
D. 0; 
2
Match the graph to one of the polar equations. 
A. r = 6 sin ? B. r = 3 + cos ? C. r = 3 + sin ? D. r = 6 cos ?
The graph of a piecewise-defined function is given. Write a definition for the function. 
A. 
B. 
C.
f(x) = 
D. 