Decide whether or not the equation has a circle as its graph. If it does not, describe the graph.x2 + y2 + 10x - 18y + 42 = 0
A. yes
B. no; the graph is the point (-5, 9)
C. no; the graph is nonexistent
D. no; the graph is the point (5, -9)
Answer: A
Mathematics
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Graph.f(x) = 
x
A. 
B. 
C. 
D. 
Mathematics
Use the quotient rule to simplify the expression. Write the expression with positive exponents. Assume that all variables represent nonzero real numbers.
A. t9
B. 
C. t5
D. 
Mathematics
Simplify the expression.
A. 4 cos x tan x
B. 4 cos x cot x
C. 
sin x cot x
D. 
cos x cot x
Mathematics
Solve the equation by completing the square. Express any complex numbers using i notation.x2 + 10x = -10
A. x = 5 + 
B. x = -5 ± 
C. x = -10 + 
D. x = 5 ± 
Mathematics