For what value of a does the equation  represent a circle with center ? When a assumes this value, what is the radius of the circle?
?

A.
B. ?
C. ?
D. ?
E. ?


Answer: A

Mathematics

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Find  by using the Chain Rule. Express your final answer in terms of t.w = , x = 3t + 1, y = et, z = 6t - 1

A.
B.
C.
D.

Mathematics

Find the exact value of the expression.cos  cos  + sin  sin 

A. 1
B.
C.
D.

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Use a calculator to find the approximate value of the composition. Round your answer to four decimal places. The expression may be undefined.cos (cos-1 (-0.9372))

A. -0.4686 B. 0.9372 C. 0.4686 D. -0.9372

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Simplify.8a - 2a - a - 12

A. 6a - 13 B. 5a - 12 C. 6a - a - 12 D. 6a - 12

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