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
Answer: D
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Calculate the flow in the field F along the path C.F = y2i + zj + xk; C is the curve r(t) = (2 + 2t)i + 4tj - 2tk , 0 ? t ? 1
A. 
B. 16
C. 48
D. 
Provide an appropriate response.Given the coefficient matrix A and the final demand matrix D stated below, find (I - A)-1 and find the output matrix X.A = 
C = 
A.
(I - A)-1 = 
; X = 
B.
(I - A)-1 = 
; X = 
C.
(I - A)-1 = 
; X = 
D.
(I - A)-1 = 
; X = 
Solve for the amount of discount and amount due.Invoice amt: $696.44Invoice date: Sept 13Terms: 1/11 EOMGoods rec'd: Sept 16Date paid: Oct 9
A. Amount of discount: $76.61; amount due: $619.83 B. Amount of discount: $6.86; amount due: $685.44 C. Amount of discount: $0; amount due: $696.44 D. Amount of discount: $6.96; amount due: $689.48
Prepare a probability distribution for the experiment. Let x represent the random variable, and let P represent the probability.Three coins are tossed, and the number of heads is noted.
A. 
B. 
C. 
D. 