Identify the equation without applying a rotation of axes.4x2 - 7xy + 2y2 + 4x + 3y + 9 = 0
A. hyperbola
B. parabola
C. ellipse
D. not a conic
Answer: A
Mathematics
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Identify which of these types of sampling is used: simple random, stratified, systematic, or convenience.To avoid working late, a quality control analyst simply inspects the first 100 items produced in a day.
A. Systematic B. Convenience C. Simple random D. Stratified
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Use the Zero Exponent Rule to simplify. All variables are nonzero.(-13xy)0
A. 13 B. 0 C. 1 D. -1
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Solve the problem.How much money is saved at a $66.67 discount price rather than a $89.16 list price?
A. $22.59 B. $22.49 C. $23.59 D. $23.49
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An arithmetic sequence is given. Find the common difference and write out the first four terms.
A. d = 
; 
, 
, 
, 
B. d = 
; 
, 
, 
, 
C. d = 
; 
, 
, 
, 
D. d = 
; 
, 
, 
, 
Mathematics