Solve the differential equation.y'' - 6y' + 8y = 0
A. y = e4x(C1 cos 2x + C2 sin 2x)
B. y = e2x(C1 cos 4x + C2 sin 4x)
C. y = C1e-2x + C2e-4x
D. y = C1e2x + C2e4x
Answer: D
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Solve the problem.How close does the curve y = 
come to the point 
? (Hint: If you minimize the square of the distance, you can avoid square roots.)
A. The distance is minimized when x = 
; the minimum distance is 
units.
B. The distance is minimized when x = 
; the minimum distance is 
units.
C. The distance is minimized when x = - 
; the minimum distance is 
units.
D. The distance is minimized when x = 
; the minimum distance is 
units.
Solve the system by the addition method. Be sure to check all proposed solutions.4x = 13y + 6-2x + 6y = 2
A. {(-31, -10)}
B. {(7, 10)}
C. {(10, 
)}
D. {(-10, - 3)}
The abbreviation "stat" means
A. every hour B. as needed C. if there is need D. immediately
Use technology to calculate det A.A = 
A. -61 B. -151 C. 61 D. 271