Find the equation of the line parallel to the line 
and passing through the midpoint of the segment joining (1, 9) and (5, -5).
?
A. 
B. ?
C. ?
D. ?
E. ?
Answer: C
Mathematics
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Find the derivative of y with respect to x.y = -cos-1 
A. 
B. 
C. 
D. 
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Write an expression for the general or nth term, an, for the geometric sequence.1, -3, 9, -27, . . .
A. an = 1 ? (-3)n B. an = 1 ? (-3)n-1 C. an = -1 ? 3n D. an = 1 ? 3n-1
Mathematics
Use the given information to find the exact value of the expression.sin ? = - 
, ? lies in quadrant IV, and cos ? = - 
, ? lies in quadrant III
Find sin (? - ?).
A. 
B. 
C. 
D. 
Mathematics
Convert the angle to a decimal in degrees. Round the answer to two decimal places.142°19'40''
A. 142.33° B. 142.34° C. 142.39° D. 142.29°
Mathematics