Find 
. Write your answer in standard polar form with the argument in radians.z1 = 4i, z2 = -6 + 6i
A. 
B. 
C. 
D. 
Answer: A
Mathematics
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mark. Find the speed (average rate of change) of the skier.
A. 12 km/hr B. 8 km/hr C. 16 km/hr D. 15 km/hr
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Find an equation of the line.
A. y = -9x B. y = x - 9 C. y = -9 D. x = -9
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A point on the terminal side of an angle ? is given. Find the exact value of the indicated trigonometric function of ?.(- 
, 
)Find cos ?.
A. - 
B. - 
C. 
D. 
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