Add or subtract as indicated. Write the answer in simplest form. 
- 
A. - 
B. 1
C. - 1
D. 
Answer: A
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Solve by the most appropriate method.2x2 - 7x - 9 = 0
A. 
, 1
B. 
, 0
C. 
, -1
D. 
, -1
Determine whether the statement is true for n = 1, 2, 3, 4, and 5. Use the number of true statements as your answer.
= 
A. 2 B. 3 C. 4 D. 5
A company installs 5000 light bulbs, each with an average life of 500 hours, standard deviation of 100 hours, and distribution approximated by a normal curve. Find the percentage of bulbs that can be expected to last the period of time. Round to the nearest hundredth, if necessary.Less than 460 hours
A. 48.40% B. 51.60% C. 34.46% D. 65.54%
Solve the sales tax problem.The purchase price of a camera is $230. If the sales tax rate is 7.9%, find the sales tax. Round to the nearest cent.
A. $248.17 B. $0.79 C. $18.17 D. $181.70