Solve the problem.A student is told to work any 7 out of 10 questions on an exam. In how many different ways can he complete the exam? (The correctness of his answers has no bearing.)
A. 10,000,000
B. 720
C. 21
D. 120
Answer: D
Mathematics
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Solve for the angle ?, where 0 ? ? ? 2?sin 2? + cos ? = 0
A. ? = 
, 
, 
, 
B. 
, 
, 
, 
C. ? = 
, 
, 
, 
D. ? = 
, 
, 
, 
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Determine whether the following is always true or not always true. Given reasons for your answers.(u × v) ? v = 0
What will be an ideal response?
Mathematics
Find the sample standard deviation of the data set.
Use the following information to answer questions 2-10. 24 students in an engineering class were asked to record the number of hours spent in a lab during a week. The results are listed below. 3, 10, 21, 14, 8, 5, 1, 4, 13, 7, 9, 6, 11, 10, 6, 7, 12, 16, 1 , 7, 14, 1, 11, 8
Mathematics
Clear fractions and solve.
+ 
= 0
A. - 
, - 
B. 3, 6
C. - 12
D. 
Mathematics