Find the directrices of the ellipse.16x2 + 4y2 = 64
A. x = ± 
B. y = ± 
C. y = ± 
D. x = ± 
Answer: C
Mathematics
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Evaluate the function for the given value of x.f(x) = -2x - 2 , x = 6
A. f(6) = -10 B. f(6) = 14 C. f(6) = -16 D. f(6) = -14
Mathematics
Verify the identity.
= 
What will be an ideal response?
Mathematics
Solve the problem.A company begins a radio advertising campaign in Chicago to market a new soft drink. The percentage of the target market that buys a soft drink is estimated by the function 
where t is the number of days of the campaign. After how long will 
of the target market have bought the soft drink?
A. 70 days B. 61 days C. 2 days D. 60 days
Mathematics
Answer the question.True or False: The graph of the equation x + 5y = 0 goes through the origin.
A. True B. False
Mathematics