If AB ? BC, DC ? BC, and AB ? CD in the figure, prove that ?BAC ? ?CBD.
(Outline) ?ABC and ?DCB are right triangles and BC ? BC, so ?ABC = ?DCB by LL. Then
?BAC ? ?CBD by C.P.
Mathematics
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Use the figure to solve the inequality.f(x) < 0
A. {x|-5 ? x ? 2}; [-5, 2] B. {x|x < -5 or x > 2}; (-?, -5) or (2, ?) C. {x|-5 < x < 2}; (-5, 2) D. {x|x ? -5 or x ? 2}; (-?, -5] or [2, ?)
Mathematics
Find the missing numerator.
= 
A. 
= 
B. 
= 
C. 
= 
D. 
= 
Mathematics
Multiply and simplify.
? 108x
A. 
B. 
C. 6,804x
D. 
Mathematics
Find an equation of the line containing the given pair of points(7, -55) and (5, -37)
A. y = 
x - 
B. y = - 
x - 
C. y = -9x + 8
D. y = 9x - 118
Mathematics