Classify the equation as a contradiction, an identity, or a conditional equation.-12s - 18 + 3(4s + 9) = 0
A. Contradiction
B. Conditional
C. Identity
Answer: A
Mathematics
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Find all the second order partial derivatives of the given function.f(x, y) = cos (xy2)
A. 
= - y2 sin xy2; 
= 2y
; 
= 
= 2
B. 
= - y2 sin xy2; 
= 2[ sin (xy2)- 2y2 cos (xy2)] ; 
= 
= 2y [sin (xy2)-y2 cos (xy2)]
C. 
= -y4 cos xy2; 
= - 2x[2xy2 cos (xy2) + sin(xy2)]; 
= 
=
- 2y[xy2 cos (xy2) + sin(xy2)];
D. 
= y2 sin xy2; 
= 2[2y2 cos (xy2) - sin (xy2)] ; 
= 
= 2y[y2 cos (xy2) - sin (xy2)]
Mathematics
Convert the improper fraction to a mixed number.
A. 5
B. 
C. 6
D. 7
Mathematics
Answer the question.Use the mathematical machine to find the input corresponding to an output of 20.
A. 84 B. 30.5 C. 14.75 D. -12
Mathematics
Use the vertical line test to determine if the graphs are functions.
A. Yes B. No
Mathematics