Find the general solution for the differential equation.x
+ 4xy - x2 = 0
A. y = 
- 
+ Ce-4x
B. y = 
- 
+ Ce-4x
C. y = 
+ 
+ Ce4x
D. y = 
- 
+ Ce4x
Answer: B
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Solve the problem using your calculator.Ten students in a graduate program were randomly selected. Their grade point averages (GPAs) when they entered the program were between 3.5 and 4.0. The following data were obtained regarding their GPAs on entering the program versus their current GPAs. Use linear regression to find a linear function that predicts a student's current GPA as a function of his or her entering GPA. Entering GPA Current GPA 3.5 3.6 3.8 3.7 3.6 3.9 3.6 3.6 3.5 3.9 3.9 3.8 4.0 3.7 3.9 3.9 3.5 3.8 3.7 4.0
A. y = 5.81 + 0.497x B. y = 4.91 + 0.0212x C. y = 3.67 + 0.0313x D. y = 2.51 + 0.329x
Find the domain of the rational expression.f(x) = 
A. 
B. {x|x is a real number and x ? 9}
C. 
D. {x|x is a real number and x ? 0}
Evaluate the square roots first, then combine the results. Use a calculator or a square root table when needed. Round to the nearest thousandth.
- 
A. 174.000 B. 10.304 C. 4.304 D. 12.961
Solve the inequality.x2 - 81 ? 0
A. (-?, -9] or [9, ?) B. [-81, 81] C. [-9, 9] D. (-?, -81] or [81, ?)