Find an equation for the ellipse described. Graph the equation.Foci at (1, 5) and (-7, 5); vertex at (-8, 5)
A. 
+ 
= 1
B. 
+ 
= 1
C. 
+ 
= 1
D. 
+ 
= 1
Answer: A
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Use the method of undetermined coefficients to solve the differential equation.
+ y = 9x + cos 2x; 
= 0 and y = 9? when x = ?
A. y = -9 sin x - 
cos x + 9x - 
cos 2x
B. y = 9 sin x + 
cos x + 9x - 
cos 2x
C. y = 9 sin x - 
cos x + 9x - 
sin 2x
D. y = 9 sin x - 
cos x + 9x - 
cos 2x
Use the brute force algorithm to find a minimum Hamilton circuit for the graph. Also, determine the total weight of the minimum Hamilton circuit.
A. Minimum Hamilton circuit is A ? B ? E ? C ? D ? A; weight = 70 B. Minimum Hamilton circuit is A ? B ? D ? C ? E ? A; weight = 71 C. Minimum Hamilton circuit is A ? B ? C ? D ? E ? A; weight = 78 D. Minimum Hamilton circuit is A ? B ? C ? E ? D ? A; weight = 72
The position vector of a particle is r(t). Find the requested vector.The velocity at t = 4 for r(t) = (8t2 + 2t + 9)i - 2t3j + (2 - t2)k
A. v(4) = 62i - 96j - 8k B. v(4) = 66i - 96j - 8k C. v(4) = 34i - 32j - 4k D. v(4) = 66i + 96j + 8k
Solve the equation.4d2 + 22d + 30 = 0
A. 
B. 
C. 
D. 