Use the reciprocal identities for the following problem.
?
If tan ? = 5a, (a? 0) find cot ?.
?
A. 
B. 
C. 
D. 
E. 
Answer: A
Mathematics
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Find the vertex of the parabola.f(x) = -5x2 - 40x - 82
A. (-4, -2) B. (4, 2) C. (4, -2) D. (2, 4)
Mathematics
Simplify.
÷ 
÷ 
A. 
B. 
C. 
D. 
Mathematics
The first card is a club or a diamond.
Two cards are dealt without replacement from a well-shuffled deck of cards. Find the probability of each event.
Mathematics
Solve the problem.Write an expression for the area of the shaded region and express it in factored form.
A. (5y - 12)2 B. (5y - 6)2 C. (5y + 12)(5y - 12) D. (5y + 6)(5y - 6)
Mathematics