Decide if the given equation is a solution of the given differential equation.2xyy' + x2 = y2, x2 + y2 = -3x
A. Yes
B. No
Answer: A
Mathematics
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Perform the indicated operation.-12 - (-7)
A. -5 B. -19 C. 19 D. 5
Mathematics
Determine whether the expression represents a number that is positive, negative, or zero.(-7)-9
A. Negative B. Zero C. Positive
Mathematics
Find the derivative of y with respect to the independent variable.y =log6
A. 
B. e6
C. 
D. 
Mathematics
Find the circumference of the circle whose radius or diameter is given. Use 
or 
as indicated. d = 16 in.. Use ? ? 3.14.
A. C ? 100.48 in. B. C ? 50.24 in. C. C ? 25.12 in. D. C ? 803.84 in.
Mathematics