Simplify.
A. 
B. 
C. 
D. 
Answer: A
Mathematics
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Write the first four terms of {an}.an = 
A. 
, 
, 
, 
B. -1, 1, 
, 
C. 1, 
, 
, 
D. 0, 
, 
, 
Mathematics
Solve the problem.Since cos 
= - 
and 
is in the interval [0, ?], cos-1 - 
=
A. - 
B. 
C. 
D. 27
Mathematics
Solve.6
- y2 = 30 y = x2 - 5
A. (- 
, 6), (
, 6)
B. (0, - 
), (0, 
), (6, - 
), (6, 
)
C. (- 
, 0), (
, 0)
D. (- 
, 0), (
, 0), (- 
, 6), (
, 6)
Mathematics
Find the probability of the event.You are dealt one card from a standard 52-card deck. Find the probability of being dealt an ace or a 7.
A. 
B. 
C. 
D. 8
Mathematics