Find the exact value.Given that cos ? = - 
with ? in quadrant II, find sin 2?.
A. 
B. 
C. - 
D. - 
Answer: D
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Solve the problem.Consider the pair of differential equations that model a predator-prey system with populations x and y. x'(t) = 3x - 4xy y'(t) = -y + 3xy(a) Find the lines along which x'(t) = 0,(b) find the lines along which y'(t) = 0, (c) find the equilibrium points for the system.
A. (a) x' = 0 along the lines x = 
and y = 0
(b) y' = 0 along the lines y = 
and x = 0
(c) (0, 0) and 
B. (a) x' = 0 along the lines x = 0 and y = 
(b) y' = 0 along the lines y = 0 and x = 
(c) (0, 0) and 
C. (a) x' = 0 along the lines x = 0 and y = 
(b) y' = 0 along the lines y = 0 and x = 3
(c) 
and 
D. (a) x' = 0 along the lines x = 0 and y = 
(b) y' = 0 along the lines y = 0 and x = 3
(c) (0, 0) and 
Solve.A spreadsheet contains 496 entries in a rectangular array which has 31 rows. How many entries are in each row?
A. 15,376 entries B. 465 entries C. 26 entries D. 16 entries
Divide using long division.
A. x + 8 B. x3 - 28 C. x - 28 D. x2 + 8
Prove the identity.2 cot 2x cos x = csc x - 2 sin x
What will be an ideal response?