Simplify.
- (
+ 12) + 
A. 9
B. 
C. 
D. 15
Answer: C
Mathematics
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Use the reciprocal and quotient identities to find the indicated function value.sec ? = - 
, tan ? = 
; find sin ?
A. 
B. 
C. - 
D. - 
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?The probability of recall in an experiment is modeled by 
, 
where x is the percent of recall. What is the probability of recalling between 50% and 80%? Round your answer to three decimal places.
?
A. ?0.387 B. ?0.221 C. ?0.685 D. ?0.173 E. ?0.867
Mathematics
Find the equation of the tangent line at the given point on the curve.2xy - 2x + y = -14; (2, -2)
A. y = - 
x + 
B. y = - 
x + 
C. y = 
x - 
D. y = 
x - 
Mathematics
If the sequence is arithmetic, find the common difference. If the sequence is not arithmetic, say so.2, 1, 0, -1, . . .
A. -1 B. -2 C. -3 D. Not arithmetic
Mathematics