Use the union rule to answer the question.If n(B) = 48, n(A ? B) = 9, and n(A ? B) = 84; what is n(A)?
A. 45
B. 36
C. 47
D. 43
Answer: A
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Find the specified vector or scalar.v = 9i + 3j; Find 2v.
A. 11i + 5j B. 18i + 3j C. 18i + 6j D. 11i + 3j
Use the graph to find the intervals on which it is increasing, decreasing, or constant.
A. Decreasing on (-?, 0); increasing on (0, ?) B. Increasing on (-?, 0); decreasing on (0, ?) C. Decreasing on (-?, ?) D. Increasing on (-?, ?)
Solve the problem.Tracey bought a diamond ring appraised at $1500 at an antique store. If diamonds have appreciated in value at an annual rate of 
what was the value of the ring 6 years ago? (Round your answer to the nearest dollar.)
A. $2516 B. $894 C. $509 D. $874
Add or subtract horizontally.Subtract -5a5 - 5a4 - 4a3 - 2a2 + 5a - 2 from -9a5 + 7a4 + 3a2 + 11.
A. -4a5 + 12a4 + 4a3 + 5a2 - 5a + 13 B. -4a5 + 12a4 - 4a3 - 5a2 + 5a + 13 C. 4a5 - 12a4 - 4a3 - 5a2 + 5a - 13 D. -4a5 + 12a4 - 4a3 + 5a2 + 5a + 13