For the proportion, find the unknown number n.
= 
A. 5
B. 4
C. 7
D. 3
Answer: D
Mathematics
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Find the derivative.y = (csc x + cot x)(csc x - cot x)
A. y ' = - csc x cot x B. y ' = 0 C. y ' = 1 D. y ' = - csc2 x
Mathematics
Subtract.6.109 - 2.7
A. 3.309 B. 4.409 C. 3.399 D. 3.409
Mathematics
Solve the equation.|
x + 2| = |
x - 2|
A. {10, 10} B. {16, 12} C. {16, 0} D. ?
Mathematics
Solve the problem.The Family Arts Center charges $21 for adults, $16 for senior citizens, and $6 for children under 12 for their live performances on Sunday afternoon. This past Sunday, the paid revenue was 
for 883 tickets sold. There were 48 more children than adults. How many children attended?
A. 346 children B. 298 children C. 336 children D. 239 children
Mathematics