Solve the given differential equation.
+ 49y = cos 7x
A. y = c1 sin 7x + c2 cos 7x + 
x cos 7x
B. y = c1 sin 7x + c2 cos 7x - 
x sin 7x
C. y = c1 sin 7x + c2 cos 7x + 
x sin 7x
D. y = c1 sin 7x + c2 cos 7x + 
x sin 7x + 
x cos 7x
Answer: C
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Find the particular solution to the given differential equation that satisfies the given conditions.2
+ 7
- 15y = 0; Dy = 0 and y = 3 when x = 0
A. y = 
e-5x + 
e3x/2
B. y = 
e5x + 
e-3x/2
C. y = 
e-5x + 
e3x/2
D. y = - 
e-5x - 
e3x/2
Provide an appropriate response.With participating preferred stock, if a dividend is not declared and paid, the dividend is in arrears and must be paid when money becomes available.
A. True B. False
Perform the indicated operation and write the answer in the form 
where a and b are real numbers.6i + (-9 - i)
A. -9 + 7i B. 9 - 5i C. -9 + 5i D. 9 - 7i
Convert the polar equation to rectangular form. Identify the curve.r = cos ?
A. x2 + y2 = y; a circle centered at 
with radius 
B. x2 + y2 = x; a circle centered at 
with radius 
C. (x + y)2 = y; a circle centered at 
with radius 
D. (x + y)2 = x; a circle centered at 
with radius 