Solve the problem.An exam consists of 9 multiple-choice questions and 6 essay questions. If the student must answer 6 of the multiple-choice questions and 2 of the essay questions, in how many ways can the questions be chosen?
A. 261,273,600
B. 1,814,400
C. 1260
D. 648
Answer: C
Mathematics
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At what points is the given function continuous?f(x, y) = 
A. All (x, y) B. All (x, y) such that x ? y C. All (x, y) such that x ? - y D. All (x, y) ? (0, 0)
Mathematics
Find the area A. Round the answer to three decimal places.
A. 3.491 yd2 B. 0.873 yd2 C. 1.111 yd2 D. 6.981 yd2
Mathematics
Determine if the equation is an identity.sin(x + y) - sin(x - y) = 2 cos x sin y
A. Identity B. Not an identity
Mathematics
Use a half-angle identity to find an exact value for the following, given the information about x. Find tan 
, given that sin x = - 
and x terminates in 180° < x < 270°.
A. 
B. - 7
C. - 
D. - 
Mathematics