Given that the pair of triangles is similar, find the unknown length of the side labeled with a variable.
A. 20
B. 19
C. 25
D. 12
Answer: A
Mathematics
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Refer to the double-bar graph below which shows the number of male (M) and female (F) athletes at a university over a four-year period. Solve the problem. 
YEARFind the increase in the number of female athletes from 1986 to 1987.
A. 50 B. 100 C. 200 D. 75
Mathematics
Solve the problem.Of all points (x, y, z) that satisfy x - y - z = 1, find the one that minimizes x2 + 2y2 + 3z2.
A. 
B. 
C. 
D. 
Mathematics
Complete the identity.
= ?
A. cot 6x B. 0 C. tan 2x tan 6x D. -tan 6x
Mathematics
Add or subtract. Simplify all answers. Express as a mixed number.16
+ 2
A. 16
B. 18
C. 19
D. 17
Mathematics