Solve the quadratic equation by the square root property.(x - 4)2 = 16
A. {-4, 4}
B. {20}
C. {0, 8}
D. {-8, 0}
Answer: C
Mathematics
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Read.Read the following micrometer.
Fill in the blank(s) with the appropriate word(s).
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Find the exact value of the expression.cos 40° cos 20° - sin 40° sin 20°
A. 
B. 
C. 
D. 
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Complete the identity.sec x - 
= ?
A. 1 + cot x B. -2 tan2 x C. sin x tan x D. sec x csc x
Mathematics