Decide whether the expression is or is not an identity.
= 1 - cos x
A. Identity
B. Not an identity
Answer: B
Mathematics
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Solve the problem.Junior high classes of 25 students each met in the cafeteria to take achievement tests. If exactly 8 students sat at each table and 25 tables were used, how many classes took the tests?
A. 10 classes B. 8 classes C. 11 classes D. 21 classes
Mathematics
Use the vectors in the figure below to graph the following vector. 
z - v 
A. 
B. 
C. 
D. 
Mathematics
Rationalize the numerator. Assume all variables represent positive numbers.
A. 
B. 
C. 
D. 
Mathematics
Add or subtract. Write the answer in lowest terms.
+ 
A. 
B. 
C. 0
D. 5
Mathematics