Find the directrices of the ellipse.
+ 
= 1
A. y = ± 
B. x = ± 
C. x = 2 ± 
D. y = -9 ± 
Answer: C
Mathematics
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Find the largest open interval where the function is changing as requested.Increasing f(x) = 
A. (-?, 1) B. (0, ?) C. (1, ?) D. (-?, 0)
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Use a truth table to determine whether the two statements are equivalent.~p ? ~q and ~(p ? q)
A. Yes B. No
Mathematics
Find the exact value. Do not use a calculator.cos 0
A. 1
B. 
C. 0
D. undefined
Mathematics
Multiply the monomials.10x5 ? 5x4
A. 50x20 B. 50x9 C. 100x9 D. 15x9
Mathematics