Find the rational number halfway between the two given rational numbers.- 
, - 
A. - 
B. - 
C. - 
D. - 
Answer: D
Mathematics
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Simplify.
A. 
B. 
C. 8 - a2
D. 8
Mathematics
Find the focus and the directrix of the parabola.3y2 + 12y + 13 - x = 0
A. Focus: (4, 1); directrix: x = 2
B. Focus: 
; directrix: x = 
C. Focus: 
; directrix: y = 
D. Focus: 
; directrix: x = 
Mathematics
Evaluate. Assume u > 0 when ln u appears. 
A. - 
+ C
B. 
+ C
C. - 
+ C
D. - 
+ C
Mathematics
Find the indicated absolute extremum as well as all values of x where it occurs on the specified domain.f(x) = (x + 1)2(x - 2); [-2, 1]Maximum
A. -4 at x = -2 B. 0 at x = -1 C. -2 at x = 0 D. No absolute maximum
Mathematics