Use a half-angle formula to find the exact value of the expression.cos 
A. 
B. 
C. - 
D. - 
Answer: A
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Perform the indicated operation and, if possible, simplify. Assume that all variables represent positive real numbers. 9
+ 9
A. 18
B. 9
C. -27
D. 27
Find the probability.In one city, the probability that a person will pass his or her driving test on the first attempt is 0.61. 11 people are selected at random from among those taking their driving test for the first time. What is the probability that among these 11 people, the number passing the test is between 2 and 4 inclusive?
A. 0.0670 B. 0.0870 C. 0.0965 D. 0.0827
Answer the question.What are the domain and range for the equation y = 2x?
A. Domain: (0, ?); range: (-?, ?) B. Domain: (-?, ?); range: (-?, ?) C. Domain: (-?, ?); range: (0, ?) D. (-?, ?); range: [0, ?)
Use the distributive property to remove parentheses and write the product as a sum. Simplify if possible.0.9(3x + 4)
A. 2.7x + 4 B. 3.9x + 4.9 C. 2.7x + 3.6 D. 2.7x - 3.6