Decompose into partial fractions.
A. 2x - 9 - 
+ 
B. 2x + 5 - 
+ 
C. 2x - 9 + 
- 
D. 2x + 9 - 
+ 
Answer: C
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Solve the system. If there is an unlimited number of solutions, find one of them.2x + 6y + 8z = 126x + 3y + 4z = -21x + y + z = -6
A. x = 3, y = 1, z = -6 B. x = -6, y = 3, z = 1 C. Unlimited: x = -6, y = 1, z = 3 D. Inconsistent
Change the improper fraction to a mixed number or a whole number.
A. 28
B. 
C. 113
D. 113
Solve the problem. Express the answer in scientific notation to two decimals.Assume that the volume of the earth is 5 × 1014 cubic meters and the volume of a bacterium is 
cubic meters. If the earth could be filled with bacteria, how many would it contain?
A. 2.0 × 1030 bacteria B. 5.0 × 10-31 bacteria C. 2.0 × 10-30 bacteria D. 5.0 × 1031 bacteria
Divide and write in standard form.
A. i - 2 B. 2i C. -2i D. 2 - i