Use Descartes' Rule of Signs to determine the possible number of positive real zeros and the possible number of negative real zeros for the function.P(x) = 9x8 + 9x6 + 4x4 + 4x2 + 3
A. 0 positive; 0 negative
B. 0 positive; 0 or 2 negative
C. 0 or 2 positive; 0 negative
D. 4 positive; 0 negative
Answer: A
Mathematics
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Use implicit differentiation to find dy/dx and d2y/dx2.x2 + y2 = 7
A. 
= - 
; 
= - 
B. 
= 
; 
= 
C. 
= - 
; 
= - 
D. 
= - 
; 
= - 
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Solve the equation.-7a + 3 + 8a = 10 - 21
A. {-34} B. {14} C. {34} D. {-14}
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Write the whole or mixed number as an improper fraction.11
A. 
B. 
C. 
D. 
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Solve the system by addition.0.15x + 0.03y = 0.065x + y = 2
A. 
B. 
C. 
D. ?
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