Graph the function.y = 4 cos (?x)

A.

B.

C.

D.

Answer: D

Mathematics

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For the given rectangular equation, write an equivalent polar equation.x = 10

A. r = 10 csc ? B. r = 10 cos ? C. r = 10 sin ? D. r = 10 sec ?

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Graph the circle.(x + 4)2 + y2 = 25

A.

B.

C.

D.

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Perform the division. Write the answer with positive exponents.

A. 9x + 3
B. 5x - 21x4 + 
C. 5x + 3
D. 5x + 3 + 

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Find the second-order partial derivative.Find fyx when f(x,y) = 8x3y - 7y2 + 2x.

A. 48xy B. -14 C. 24x2 D. -28

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