Decompose into partial fractions.
A. 2x - 9 - 
+ 
B. 2x + 5 - 
+ 
C. 2x - 9 + 
- 
D. 2x + 9 - 
+ 
Answer: C
Mathematics
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Find the exact value of the expression.cos 40° cos 20° - sin 40° sin 20°
A. 
B. 
C. 
D. 
Mathematics
Solve the problem.There are 29 contestants in a singing competition. They are to sing in random order. How can the organizer of the competition use a graphing calculator to determine the order?
What will be an ideal response?
Mathematics
Expand.
3
A. 
x6 + 
x3 + 8
B. 
x3 + 
x2 + 8
C. 
x3 + 
x2 + 4x + 8
D. 
x3 + 
x2 + 4x + 8
Mathematics
Find the integrating factor I(x) for each equation, and then find the general solution.y' + x2y = 9x2
A. I(x) = e
; y = Ce- 
+ 9
B. I(x) = ex; y = Ce- 
+ 9
C. I(x) = ex; y = Ce-x + 9
D. I(x) = e
; y = Ce-x + 9
Mathematics