Solve the equation.
+ 
= 1
A. 16
B. 
C. 72
D. 9
Answer: C
Mathematics
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Use the method of undetermined coefficients to solve the differential equation.
- 2
+ y = xe8x - e8x; 
= 0 and y = 0 when x = 0
A. y = 
ex + 
xex + 
xe8x - 
e8x
B. y = 
ex - 
xex + 
xe8x - 
e8x
C. y = 
ex + 
xex + 
xe8x + 
e8x
D. y = 
ex + 
xex + 
xe8x - 
e8x
Mathematics
Add.(-7 + 3x6 + 5x4) + (5x6 + 5x4 - 2)
A. -2x6 + 8x4 + 3 B. 8 + 10x6 - 9x4 C. 8x6 + 10x4 - 9 D. 9x10
Mathematics
The data in the figure below represents the annual salaries of 200 professional musicians.
The median salary of this group of musicians is approximately
A. $60,000. B. $40,000. C. $50,000. D. $80,000. E. none of these
Mathematics
Using a sum or difference identity, write the following as an expression involving functions of x.sin 
A. -cos x
B. 
cos x + 
sin x
C. 
cos x - 
sin x
D. sin x
Mathematics